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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NetAssetRetirementCostsRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net asset retirement costs related to USTs removed from balance sheet</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NetAssetRetirementCostsRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net asset retirement costs related to underground storage tanks removed from the balance sheet in conjunction with a transfer of related obligations to the lessee.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DirectFinancingLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Direct Financing Leases Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DirectFinancingLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for recording and recognizing income under direct financing leases.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Financing Receivable [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmendedAndRestatedTwoThousandAndFourOmnibusIncentiveCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amended and Restated 2004 Omnibus Incentive Compensation Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmendedAndRestatedTwoThousandAndFourOmnibusIncentiveCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amended And Restated Two Thousand And Four Omnibus Incentive Compensation Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmendedAndRestatedTwoThousandAndFourOmnibusIncentiveCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amended and restated 2004 omnibus incentive compensation plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesSubjectToLongTermTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of leased properties subject to long-term triple-net leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesSubjectToLongTermTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Leased Properties Subject To Long Term Triple Net Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesSubjectToLongTermTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of leased properties subject to long-term triple-net leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation liabilities discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual for Environmental Loss Contingencies, Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_JulyTwoThousandAndTwentyFourForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">July Two Thousand And Twenty Four Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_JulyTwoThousandAndTwentyFourForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">July two thousand and twenty four forward offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_JulyTwoThousandAndTwentyFourForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 2024 Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Receivable, after Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseDeferredSellingProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Direct Financing Lease, Deferred Selling Profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseDeferredSellingProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investment in direct financing lease, unearned income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseDeferredSellingProfit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net Investment in direct financing lease, unearned income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentyThreeForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">February two thousand and twenty three forward offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentyThreeForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand And Twenty Three Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentyThreeForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2023 Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DepreciationAndAmortizationForCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization expense for capitalized asset retirement costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DepreciationAndAmortizationForCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation And Amortization For Capitalized Asset Retirement Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DepreciationAndAmortizationForCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The current period expense charged against earnings for the allocation of capitalized asset retirement costs over the remaining useful life of the underground storage tank or other period of time if circumstances warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value by Liability Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value by Liability Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest rate on agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Stated Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwentyOneAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and twenty one at the market equity offering program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwentyOneAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Twenty One At The Market Equity Offering Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwentyOneAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Scheduled Debt Maturities, Including Balloon Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Maturities of Long-Term Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeaseTermination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of lease termination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeaseTermination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of lease termination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryAgencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory Agency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryAgencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Agency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleOfCommonStockAverageGrossOfferingPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of common stock average gross offering price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleOfCommonStockAverageGrossOfferingPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Common Stock Average Gross Offering Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleOfCommonStockAverageGrossOfferingPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of common stock average gross offering price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivable Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasesPortfolioSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Direct Financing Leases Financing Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasesPortfolioSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Leases Portfolio Segment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MultiplePurchasersPartyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Multiple purchasers party agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MultiplePurchasersPartyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Multiple purchasers party agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MultiplePurchasersPartyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Multiple Purchasers Party Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NewYorkLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New York Life Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NewYorkLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">New York Life Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NewYorkLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New York Life Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Amended and Restated AIG Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Amended And Restated A I G Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">First amended and restated AIG agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders&#8217; equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investment in direct financing lease, additional allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Leases Net Investment In Direct Financing Leases Increase Decrease In Allowance For Credit Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital leases net investment in direct financing leases increase decrease in allowance for credit losses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfDefendantsUnderComplaint_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of defendants under complaint</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfDefendantsUnderComplaint_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Defendants Under Complaint</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfDefendantsUnderComplaint_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of defendants under complaint filed by Occidental.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_InvestmentBuildingsAndImprovementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings and improvements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_InvestmentBuildingsAndImprovementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Buildings And Improvements Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_InvestmentBuildingsAndImprovementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate amount as of the balance sheet date of investments in buildings and building improvements that are held for use before accumulated depreciation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="stpr_PA_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="stpr_PA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PENNSYLVANIA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Amounts Recorded to Accumulated Other Comprehensive Income (Loss) Related to Derivative and Hedging Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation and settlements, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfARKOCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsidiaries of ARKO Corp. (NASDAQ: ARKO) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfARKOCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries Of A R K O Corp [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfARKOCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subsidiaries of ARKO Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfLessorLeasingArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description Of Lessor Leasing Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfLessorLeasingArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">A general description of the nature of the existing leasing arrangements of a lessor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfLessorLeasingArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remediation agreement of lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining number of shares subject to forward sale agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Number Of Shares Subject To Forward Sale Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining number of shares subject to forward sale agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease asset.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MethylTertiaryButylEtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MTBE [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MethylTertiaryButylEtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Methyl Tertiary Butyl Ether [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MethylTertiaryButylEtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Methyl tertiary butyl ether.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CreditAndLoanAgreementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit and Loan Agreement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CreditAndLoanAgreementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit And Loan Agreement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CreditAndLoanAgreementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Credit and loan agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ChangesInEnvironmentalEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in environmental estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ChangesInEnvironmentalEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Changes In Environmental Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ChangesInEnvironmentalEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Changes in environmental estimates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CarWashPropertiesUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Car wash properties under construction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CarWashPropertiesUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Car Wash Properties Under Construction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfOrdinaryDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments of Ordinary Dividends, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfOrdinaryDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of regular quarterly dividend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfOrdinaryDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Ordinary Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetRetirementObligationAccretionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accretion expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetRetirementObligationAccretionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Retirement Obligation, Accretion Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PrepaidExpensesAndOtherAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expenses And Other Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PrepaidExpensesAndOtherAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid Expenses And Other Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PrepaidExpensesAndOtherAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid Expenses and Other Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciles the Undiscounted Cash Flows for Direct Financing Lease Liabilities and Operating Lease Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability And Operating Lease Liability Maturity Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of maturity of finance lease liability and operating lease liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital, Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivableFiscalYearMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Direct financing leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivableFiscalYearMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Fiscal Year Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BelowMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase price allocated to below market leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BelowMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocated to below market leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BelowMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Below Market Lease, Acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BelowMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Purchase price allocated to below market leases/prepaid rent liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued pursuant to dividend reinvestment, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockAtmProgram_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance of Common Stock ATM Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockAtmProgram_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock ATM program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockAtmProgram_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock, net - ATM Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ForwardStartingInterestRateSwapAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forward starting interest rate swap agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ForwardStartingInterestRateSwapAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward starting Interest Rate Swap Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ForwardStartingInterestRateSwapAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward-starting interest rate swap agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized gain (loss) on cash flow hedges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleLeasebackTransactionNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Leaseback Transaction, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computation of Basic and Diluted Earnings Per Common Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CarWashPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Car Wash Properties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CarWashPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Car Wash Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CarWashPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Car Wash Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesAllowedForSaleUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares allowed for sale under forward provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesAllowedForSaleUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of shares allowed for sale under forward provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesAllowedForSaleUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares allowed for sale under forward provisions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ComprehensiveEnvironmentalResponseCompensationAndLiabilityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CERCLA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ComprehensiveEnvironmentalResponseCompensationAndLiabilityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Environmental Response Compensation And Liability Act [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ComprehensiveEnvironmentalResponseCompensationAndLiabilityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Comprehensive environmental response, compensation, and liability act member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncomeStatementLeaseRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rental income contractually due from tenants in revenues from rental properties included in continuing operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncomeStatementLeaseRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement Lease Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncomeStatementLeaseRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The total amount of revenue recognized for the period from operating leases, direct financing leases, above and below market leases and sublease revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Basic earnings per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic net earnings per common share:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series C Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLeaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Lease Income, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLeaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues from rental properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLeaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Lease Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnderwritersOptionToPurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriters option to purchase.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnderwritersOptionToPurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriters Option To Purchase [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnderwritersOptionToPurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriters' Option to Purchase [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPreviouslyDisposedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Previously Disposed [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPreviouslyDisposedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property Previously Disposed [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPreviouslyDisposedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Property previously disposed member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net earnings to net cash flow provided by operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Leased Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate number of properties currently being leased to subsidiaries of our tenant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combination, Separately Recognized Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Separately Recognized Transaction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedCostOfDredgingAndCappingToControlSedimentSourcesOfDioxinAndPcbs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Cost of Dredging and Capping to Control Sediment Sources of Dioxin and PCBs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedCostOfDredgingAndCappingToControlSedimentSourcesOfDioxinAndPcbs_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated cost of dredging and capping to control sediment sources of dioxin and PCBs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedCostOfDredgingAndCappingToControlSedimentSourcesOfDioxinAndPcbs_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated cost of dredging and capping to control sediment sources of dioxin and PCBs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; equity:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Unsecured Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments of Senior Unsecured Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series B Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update 2016-02 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2016-02 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PaymentsInSettlementOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments in settlement of restricted stock units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PaymentsInSettlementOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments In Settlement Of Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PaymentsInSettlementOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash outflow to settle restricted stock units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ImpairedRealEstateAssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impaired real estate assets measured at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ImpairedRealEstateAssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Real Estate Assets Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ImpairedRealEstateAssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the impaired real estate assets as of the end of the reporting period that are valued by the entity at fair value as of the balance sheet date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Discount Rate [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted-average discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesHNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series H Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesHNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series H Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesHNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series H Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CollectionOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collection of notes and mortgages receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CollectionOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collection Of Notes And Mortgages Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CollectionOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow from the collection of notes and mortgages receivable that are classified as investing activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments of Dividends, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of cash dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCashPayoutOwedByResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remediation cost for identified responsible parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCashPayoutOwedByResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Of Cash Payout Owed By Responsible Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCashPayoutOwedByResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of the cash payout owed as part of the final settlement agreement with 15 of the 20 identified parties..</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due After Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lessee operating lease liability payments due after year four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MaturitiesOfLongTermDebtAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maturities of Long-Term Debt [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedCostsAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capitalized asset retirement costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedCostsAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Oil and Gas, Capitalized Cost, before Accumulated Depreciation, Depletion, Amortization, and Valuation Allowance, Asset Retirement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseInCarryingValueOfProperty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in carrying value of property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseInCarryingValueOfProperty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase In Carrying Value Of Property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseInCarryingValueOfProperty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of the increase in the carrying value of the property.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest on lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Interest Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES AND STOCKHOLDERS' EQUITY:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesLeasedToMarketingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Properties Leased to Marketing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesLeasedToMarketingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Properties Leased to Marketing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesLeasedToMarketingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Properties Leased to Marketing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flow provided by operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateNonCashAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue non-cash adjustments included in revenues from rental properties in continuing operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateNonCashAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Real estate non-cash adjustments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateNonCashAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Non-cash Adjustments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation and settlements, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment To Additional Paid In Capital Sharebased Compensation Requisite Service Period Increase Decrease In Recognition Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of the increase (decrease) in the recognition value of additional paid in capital for share based compensation related to the requisite service period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCashHeldForPropertyAcquisitions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deposits for property acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCashHeldForPropertyAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Cash Held For Property Acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCashHeldForPropertyAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The net cash inflow or outflow for the net change associated with funds from 1031 exchange escrow accounts intended for use and are associated with underlying transactions that are classified as investing activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCashHeldForPropertyAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits for property acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmProfitLossMeasureHowUsedDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfInitialTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unitary triple-net lease agreements initial terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfInitialTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period Of Initial Term Under Unitary Triple Net Lease Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfInitialTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of years in the initial term under unitary triple-net lease agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesPNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series P Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesPNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series P Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesPNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series P Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Lease-related Assets and Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Lease Related Assets And Liabilities Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of lease-related assets and liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocated to in-place leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Acquired-in-Place Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate SOFR Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secured overnight financing rate SOFR adjustment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DriveThruQSRsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Drive-thru QSRs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DriveThruQSRsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Drive thru Q S Rs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DriveThruQSRsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Drive thru QSRs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Investment Property, Net [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Estate:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective fixed interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization Consolidation And Presentation Of Financial Statements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization consolidation and presentation of financial statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impaired Long-Lived Assets Held and Used, Asset Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Long-Lived Assets Held and Used, Asset Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosures of cash flow information Cash paid during the period for:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series E Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series E Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Separately Recognized Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combination, Separately Recognized Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease right of use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets - operating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: amount representing interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesPreviouslyRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unknown reserve liabilities previously removed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesPreviouslyRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unknown reserve liabilities previously removed.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MaximumLeaseCommitmentForCapitalExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum lease commitment for capital expenditure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MaximumLeaseCommitmentForCapitalExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Lease Commitment For Capital Expenditure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MaximumLeaseCommitmentForCapitalExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The maximum dollar amount the company has committed to co-invest with tenants for capital expenditures.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series D Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AverageRemainingLeaseTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Average remaining lease term under unitary triple net lease agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AverageRemainingLeaseTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Average Remaining Lease Term Under Unitary Triple Net Lease Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AverageRemainingLeaseTermUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unitary triple-net lease agreements average remaining lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Land_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Land_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MortgageLoanRelatedToPropertySales1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of notes and mortgages receivable related to property dispositions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MortgageLoanRelatedToPropertySales1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Loan Related to Property Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Taxes Paid, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Real estate, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Investment Property, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line Of Credit Facility [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MortgageLoansOnRealEstateOriginalLoanAmountAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MortgageLoansOnRealEstateOriginalLoanAmountAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Amount [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Change in cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Activities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FollowOnPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Follow-on public offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FollowOnPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Follow-on Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FollowOnPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Follow-on Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesOToQNoteMaturingInJanuaryTwentyTwoThousandThirtyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series O To Q note maturing In january twenty two thousand thirty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesOToQNoteMaturingInJanuaryTwentyTwoThousandThirtyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series O To Q Note Maturing In January Twenty Two Thousand Thirty Three Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesOToQNoteMaturingInJanuaryTwentyTwoThousandThirtyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series O-Q Notes Maturing in January 2033 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Loss Contingency Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BaseRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BaseRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Base Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due After Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Finance lease liability payments due after year four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Changes in Stockholders' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Stockholders Equity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalProtectionAgencyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EPA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalProtectionAgencyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Protection Agency [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalProtectionAgencyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Environmental protection agency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal After Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Termination of Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized gain related to lease termination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfRemainingSettlingParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of remaining settling parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfRemainingSettlingParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of remaining settling parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsLeasingAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred rental revenue accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsLeasingAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Costs, Leasing, Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IssuanceOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Issuance of notes and mortgages receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IssuanceOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Notes And Mortgages Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IssuanceOfNotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of notes and mortgages receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Derivative, Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining lease term (years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Remaining Lease Term [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted-average remaining lease term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfAllocationMethodologyApprovedByEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Description of allocation methodology approved by EPA.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfAllocationMethodologyApprovedByEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Allocation Methodology Approved by EPA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DescriptionOfAllocationMethodologyApprovedByEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of allocation methodology approved by EPA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesPreviouslyLeased_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of properties previously leased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesPreviouslyLeased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Previously Leased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesPreviouslyLeased_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of properties previously leased to the tenant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNoteMaturingInJanuaryTwentyTwoThousandThirtySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series U Maturing In January 2036 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNoteMaturingInJanuaryTwentyTwoThousandThirtySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series U Note Maturing In January Twenty Two Thousand Thirty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNoteMaturingInJanuaryTwentyTwoThousandThirtySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series U note maturing in January twenty two thousand thirty six.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedMaximumRemainingUsefulLifeOfUndergroundStorageTankCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated maximum remaining useful life of underground storage tanks used to calculate depreciation of capitalized asset retirement costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedMaximumRemainingUsefulLifeOfUndergroundStorageTankCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Maximum Remaining Useful Life Of Underground Storage Tank Capitalized Asset Retirement Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedMaximumRemainingUsefulLifeOfUndergroundStorageTankCapitalizedAssetRetirementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The estimated maximum remaining useful life of underground storage tanks used to calculate depreciation of capitalized asset retirement costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Held For Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Dividend, Share-Based Payment Arrangement, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividend, Share-Based Payment Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less dividend equivalents attributable to RSUs outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incremental shares from stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ReasonablyEstimableEnvironmentalRemediationObligationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reasonably Estimable Environmental Remediation Obligation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ReasonablyEstimableEnvironmentalRemediationObligationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reasonably Estimable Environmental Remediation Obligation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ReasonablyEstimableEnvironmentalRemediationObligationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reasonably estimable environmental remediation obligation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesONotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series O Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesONotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series O Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesONotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series O Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Number of Shares Subject To Forward Sale Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining number of shares subject to forward sale agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Remaining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of potentially responsible parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Potentially Responsible Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsibleParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of parties potentially responsible.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SupplementalCashFlowInformationRelatedToLeaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information Related To Lease [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SupplementalCashFlowInformationRelatedToLeaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Supplemental cash flow information related to lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive income:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability And Operating Lease Liability Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Finance lease liability and operating lease liability maturity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization consolidation and presentation of financial statements.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesMNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series M Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesMNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series M Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized debt issuance costs, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unamortized debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Term [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Expected Term [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investments in direct financing lease, lease payments receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit carrying value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying value of borrowings under Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Unsecured Notes, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unsecured Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowings under note purchase and guarantee agreement, outstanding amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unsecured Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketDirectIssuancesProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM Direct Issuances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketDirectIssuancesProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Direct Issuances Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketDirectIssuancesProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ATM Direct Issuances.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="stpr_MD_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MARYLAND [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="stpr_MD_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MARYLAND</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccumulationOfAssetRetirementCostMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulation of Asset Retirement Cost Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccumulationOfAssetRetirementCostMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulation Of Asset Retirement Cost Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccumulationOfAssetRetirementCostMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accumulation of asset retirement cost method.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Six Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Six properties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Six Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UpperNineMileIrRodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upper Nine-mile IR ROD.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UpperNineMileIrRodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upper Nine-mile IR ROD [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UpperNineMileIrRodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upper 9-mile IR ROD [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes And Mortgages Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes and mortgages receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes And Mortgages Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdditionalPaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional payments to acquire properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdditionalPaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Payments To Acquire Commercial Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AdditionalPaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional payments to acquire commercial real estate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RevolvingFacilityOptionalExtensionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving facility optional extension period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RevolvingFacilityOptionalExtensionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Facility Optional Extension Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RevolvingFacilityOptionalExtensionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The length of time the Revolving Facility may be extended.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ConvenienceStoresMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convenience Stores.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ConvenienceStoresMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convenience Stores [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ConvenienceStoresMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convenience Stores [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityOptionalExtendedMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility agreement, optional extended maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityOptionalExtendedMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Optional Extended Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityOptionalExtendedMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility optional extended maturity date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, $0.01 par value; 20,000,000 authorized; unissued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Real Estate Held for Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Groups, Including Discontinued Operations [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Senior unsecured note purchase agreement, maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfEntitiesToWhichGeneralNoticeLettersIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of entities to which general notice letters issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfEntitiesToWhichGeneralNoticeLettersIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Entities To Which General Notice Letters Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfEntitiesToWhichGeneralNoticeLettersIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of entities to which general notice letters issued.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassified amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Measurements, Nonrecurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Nonrecurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PartiesToPerformRemedialInvestigationAndFeasibilityStudy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parties to perform a remedial investigation and feasibility study</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PartiesToPerformRemedialInvestigationAndFeasibilityStudy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Parties To Perform Remedial Investigation And Feasibility Study</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PartiesToPerformRemedialInvestigationAndFeasibilityStudy_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of parties required to perform a remedial investigation and feasibility study.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredInSeparateTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Properties Acquired In Separate Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredInSeparateTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Properties Acquired In Separate Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredInSeparateTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Properties acquired in separate transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash and Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Liability, Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit agreement margin on borrowing base rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Basis Spread on Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedSalePriceMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated Sale Price Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedSalePriceMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Sale Price Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedSalePriceMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated sale price method.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series U Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series U notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesUNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series U Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDAndENoteMaturingInJuneTwoThousandTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series D and E note maturing in June two thousand twenty eight.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDAndENoteMaturingInJuneTwoThousandTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D and E Note Maturing In June Two Thousand Twenty Eight [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesDAndENoteMaturingInJuneTwoThousandTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D-E Notes Maturing in June 2028 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesJNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series J Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesJNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series J notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesJNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series J Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeCashReceivedOnHedge_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash settlement payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeCashReceivedOnHedge_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Cash Received on Hedge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock, net - equity offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from issuance of common stock, net equity offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock, net equity offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocated to land</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Land</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLease_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net investment in direct financing leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in direct financing leases, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Direct Financing Lease, Net Investment in Lease, before Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Held For Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of properties held for sale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesSNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series S Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesSNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series S Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesSNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series S Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInDeferredRentReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred rent receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInDeferredRentReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Deferred Rent Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInDeferredRentReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase (decrease) during the reporting period in the amount due that is the result of the cumulative difference between actual rent due and rental income recognized on a straight-line basis for uncollectible rent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Express Tunnel Car Washes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Express tunnel car washes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Express Tunnel Car Washes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock, net, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock Net Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock net value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for lessor entity's leasing arrangements for operating, capital and leveraged leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPlantAndEquipmentAssumedHoldingPeriods_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumed holding periods for unobservable inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPlantAndEquipmentAssumedHoldingPeriods_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Assumed Holding Periods</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertyPlantAndEquipmentAssumedHoldingPeriods_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Property plant and equipment assumed holding periods.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total debt, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CostsAndExpensesBeforeGainsLossesFromSaleOfProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CostsAndExpensesBeforeGainsLossesFromSaleOfProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs And Expenses Before Gains Losses From Sale Of Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CostsAndExpensesBeforeGainsLossesFromSaleOfProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Costs and expenses before gains losses from sale of properties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesKnownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation obligation known reserve liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesKnownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual For Environmental Loss Contingencies Known Reserve Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesKnownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrual for Environmental loss contingencies known reserve liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&#8217; equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Notional Amount at Inception and Fairvalue of Instruments Included In Consolidated Balance sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives Not Designated as Hedging Instruments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesTNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series T Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesTNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series T notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesTNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series T Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates, Judgments and Assumptions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountAgreedBySettlingPartiesToEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount agreed by settling parties to EPA.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountAgreedBySettlingPartiesToEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Agreed by Settling Parties to EPA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountAgreedBySettlingPartiesToEpa_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount agreed by settling parties to EPA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Financing Receivable, Allowance for Credit Loss, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Financing Receivable, Allowance for Credit Loss, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Amended and Restated MassMutual Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Amended And Restated Mass Mutual Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FirstAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">First amended and restated massmutual agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredOnJune2022Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Properties Acquired On June 2022 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredOnJune2022Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Properties Acquired On June2022 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PropertiesAcquiredOnJune2022Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Properties acquired on June 2022.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowancesReductionsForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital leases net investment in direct financing leases increase decrease in allowances (reductions) for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowancesReductionsForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital leases net investment in direct financing leases increase decrease in allowances (reductions) for credit losses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowancesReductionsForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investment in direct financing lease, additional allowances (reductions) for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Investing and Financing Items [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Discount Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Discount Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalExpenseAndLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Environmental Expense and Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalExpenseAndLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalExpenseAndLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Expense and Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Obligations [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Operating and Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Maturity Amounts Outstanding Under Credit Agreement and Senior Unsecured Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Line of Credit Facilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock under the dividend reinvestment plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Remediation Contingency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Contingency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyWhoseConstructionIsCompleted_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of property whose construction is completed.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyWhoseConstructionIsCompleted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of property whose construction is completed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of properties sold during the period that were previously held for sale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net earnings attributable to common stockholders used in basic and diluted earnings per share calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income Loss Available To Common Stockholders Basic And Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The net income loss available to common stockholders used for basic and diluted earnings per share calculations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incremental shares from ATM Program forward agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_GettyPetroleumMarketingIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Getty Petroleum Marketing Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_GettyPetroleumMarketingIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Getty Petroleum Marketing Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_GettyPetroleumMarketingIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Getty Petroleum Marketing Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputCapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Cap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputCapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Cap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryAgencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory Agency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryAgencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Agency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAndLiabilitiesLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets and Liabilities, Lessee [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AboveMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocated to above market leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AboveMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Above Market Lease Acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AboveMarketLeaseAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of acquired leases acquired as part of a real property acquisition at above market lease rate with a finite life.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalizedAssetRetirementCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capitalized Asset Retirement Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalizedAssetRetirementCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capitalized Asset Retirement Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalizedAssetRetirementCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capitalized asset retirement costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable and Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLToNSToTNotesMaturingInFebruaryTwentyTwoTwoThousandThirtyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series L To N, S To T Notes Maturing In February Twenty Two Two Thousand Thirty Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLToNSToTNotesMaturingInFebruaryTwentyTwoTwoThousandThirtyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series L-N, S-T Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLToNSToTNotesMaturingInFebruaryTwentyTwoTwoThousandThirtyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series L-N, S-T Notes Maturing in February 2032 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRentReceivablesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred rent receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRentReceivablesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Rent Receivables, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Property Plant Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Property Plant Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gains on dispositions of real estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesGNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series G Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesGNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series G Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesGNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series G Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfPropertyRepairsAndMaintenance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfPropertyRepairsAndMaintenance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Property Repairs and Maintenance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units (RSUs) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency Nature</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Nature [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DividendsPaidInExcessOfEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dividends paid in excess of earnings.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DividendsPaidInExcessOfEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Paid in Excess of Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency, Nature</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Nature [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Remediation Site</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Site [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EightMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">8 Mile Stretch of Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EightMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eight Mile Stretch Of Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EightMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eight mile stretch of Lower Passaic River.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesNNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series N Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesNNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series N Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesNNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series N Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Held For Sale Property Accumulated Depreciation And Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Real estate held for sale property, accumulated depreciation and amortization.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Dividends, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstatePropertiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Estate Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstatePropertiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Properties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Right-of-Use Asset, Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of leased assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finite-Lived Intangible Assets, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesUnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation obligation unknown reserve liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesUnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual For Environmental Loss Contingencies Unknown Reserve Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesUnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrual for environmental loss contingencies unknown reserve liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesQNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series Q Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesQNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series Q Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesQNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series Q notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FutureEnvironmentalLiabilitiesForPreexistingUnknownContaminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Future Environmental Liabilities for Preexisting Unknown Contamination [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FutureEnvironmentalLiabilitiesForPreexistingUnknownContaminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Future Environmental Liabilities For Preexisting Unknown Contamination [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FutureEnvironmentalLiabilitiesForPreexistingUnknownContaminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Future environmental liabilities for preexisting unknown contamination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investments in direct financing lease, lease payments receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Leases Net Investment In Direct Financing Leases Payments To Be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital leases net investment in direct financing leases payments to be received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationContingencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Remediation Contingency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationContingencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Contingency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series F Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series F Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series F Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesUnderRedevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties under redevelopment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesUnderRedevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Under Redevelopment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesUnderRedevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of properties under redevelopment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeniorUnsecuredNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Unsecured Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeniorUnsecuredNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Senior Unsecured Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeniorUnsecuredNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior unsecured notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccruedLegalMatters_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued legal matters</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccruedLegalMatters_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Legal Matters</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccruedLegalMatters_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying value as of the balance sheet date of obligations incurred through that date and payable related to legal proceedings and claims which have arisen in the ordinary course of business.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Revenue, Net [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investment in direct financing lease, allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Leases Net Investment In Direct Financing Leases Allowance For Credit Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital leases net investment in direct financing leases allowance for credit losses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnamortizedDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnamortizedDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unamortized debt issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfRealEstateProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfRealEstateProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Real Estate Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments, Gain (Loss) [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Costs [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FinanceLeaseCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Finance lease costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction Loans and Development Financing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility maturity date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series L Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series L Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesLNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series L Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WhollyOwnedPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Owned Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WhollyOwnedPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wholly Owned Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRentCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred rental revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRentCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Rent Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Future Contractual Annual Rentals Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, Fiscal Year Maturity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSignificantTenantsByRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Significant Tenants by Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSignificantTenantsByRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of significant tenants by revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSignificantTenantsByRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Significant Tenants by Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Impairment Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateForLessorPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateForLessorPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate For Lessor Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateForLessorPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for an entity that owns real property which is leased to tenants to produce rental income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued pursuant to equity offering/ATM Program, net, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Shares issued pursuant to ATM Program, net, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentOperatingActivitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentOperatingActivitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Activities [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestRateSwapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Swap [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestRateSwapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest Rate Swap [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestRateSwapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MetLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Met Life Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MetLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">MetLife Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MetLifeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Met Life Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnings Per Common Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Discontinued Operations and Disposal Groups [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseUnguaranteedResidualAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Direct Financing Lease, Unguaranteed Residual Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseUnguaranteedResidualAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Investment in direct financing lease, unguaranteed residual value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lower Passaic River.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AnticipatedGrossProceedsRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anticipated Gross Proceeds Remaining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AnticipatedGrossProceedsRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Anticipated Gross Proceeds Remaining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AnticipatedGrossProceedsRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Anticipated gross proceeds remaining.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of Credit Facility [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNumberOfInstrumentsHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Number of Instruments Held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNumberOfInstrumentsHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative, Number of Instruments Held, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNumberOfInstrumentsHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding derivative instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement, Amount Awarded to Other Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating cash flows for operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesFairValueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives, Fair Value [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASSETS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Real Estate Held For Sale [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Real Estate Held For Sale [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of real estate held for sale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less accumulated depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Investment Property, Accumulated Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesLeasedFromLandlords_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties leased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesLeasedFromLandlords_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Leased From Landlords</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesLeasedFromLandlords_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of real estate properties leased from third-party landlords as of the balance sheet date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Express Tunnel Car Washes Under Construction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Express tunnel car washes under construction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ExpressTunnelCarWashesUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Express Tunnel Car Washes Under Construction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PollutionLegalLiabilityInsurancePolicyAggregateLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pollution legal liability insurance policy aggregate limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PollutionLegalLiabilityInsurancePolicyAggregateLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pollution Legal Liability Insurance Policy Aggregate Limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PollutionLegalLiabilityInsurancePolicyAggregateLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate dollar limit of the pollution legal liability insurance policy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ThirdPartyLandlordsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Third Party Landlords [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ThirdPartyLandlordsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Third Party Landlords [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ThirdPartyLandlordsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Third-party landlords.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM INVESTING ACTIVITIES:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventeenMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">17 Mile Stretch of Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventeenMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seventeen Mile Stretch Of Lower Passaic River [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventeenMileStretchOfLowerPassaicRiverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Seventeen mile stretch of Lower Passaic River.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesInflationAdjustmentRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation liability inflation rate adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesInflationAdjustmentRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual For Environmental Loss Contingencies Inflation Adjustment Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AccrualForEnvironmentalLossContingenciesInflationAdjustmentRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The inflation adjustment rate for environmental loss contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleLeasebackTransactionDescriptionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Leaseback Transaction, Description [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfSuccessiveRenewalTermsUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unitary triple-net lease agreements successive terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfSuccessiveRenewalTermsUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period Of Successive Renewal Terms Under Unitary Triple Net Lease Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodOfSuccessiveRenewalTermsUnderUnitaryTripleNetLeaseAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of years in the successive renewal term under unitary triple-net lease agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LookbackPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lookback Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LookbackPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lookback Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LookbackPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lookback period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AcquisitionOfRealEstateAssetsUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquire real estate assets under construction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AcquisitionOfRealEstateAssetsUnderConstructionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition of Real Estate Assets Under Construction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesVacant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties vacant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesVacant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties Vacant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesVacant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of properties vacant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumed annual average rent increases for unobservable inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Annual Assumed Average Rent Increases Unobservable Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of annual assumed average rent increases used as an unobservable input to measure the fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ShareholdersEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholders Equity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ShareholdersEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shareholders Equity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ShareholdersEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shareholders equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DividendsDeclaredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends declared but not yet paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DividendsDeclaredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Declared But Not Yet Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DividendsDeclaredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dividends declared but not yet paid.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Weighted-average Remaining Lease Terms and Discount Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Weighted Average Remaining Lease Terms And Discount Rates Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of weighted-average remaining lease terms and discount rates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstatePropertiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Estate Property Ownership</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstatePropertiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Property Ownership [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net earnings attributable to common stockholders used in basic earnings per share calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Available to Common Stockholders, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfResaleAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Activity under ATM Program in connection with Forward Sale Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfResaleAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Resale Agreements [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Line of Credit, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowings under credit agreement, outstanding amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Line of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Assets, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sixth Amended and Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sixth Amended And Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sixth amended and restated prudential agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SixthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Sixth Amended And Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">% of Total Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LiborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LIBOR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LiborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LIBOR.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flow used in investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesInPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of properties in portfolio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesInPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Properties In Portfolio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertiesInPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of real estate properties in the portfolio, consisting of properties owned and properties leased from third party landlords.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MutualFundsFairValueAssetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mutual Funds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MutualFundsFairValueAssetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mutual Funds Fair Value Asset [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_MutualFundsFairValueAssetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mutual funds fair value asset.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnauditedInterimConsolidatedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unaudited, Interim Consolidated Financial Statements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnauditedInterimConsolidatedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unaudited Interim Consolidated Financial Statements Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnauditedInterimConsolidatedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for unaudited, interim consolidated financial statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for amounts included in the measurement of lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Paid For Amounts Included In Measurement Of Lease Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash paid for amounts included in the measurement of lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLeasePastDueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Direct Financing Lease, Net Investment in Lease, Past Due [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DirectFinancingLeaseNetInvestmentInLeasePastDueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Components of Investment in Direct Financing Leases, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFToHRNotesMaturingInSeptemberTwoThousandTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series F To H, R Notes Maturing In September Two Thousand Twenty Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFToHRNotesMaturingInSeptemberTwoThousandTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series F-H, R Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesFToHRNotesMaturingInSeptemberTwoThousandTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series F-H, R Notes Maturing in September 2029 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentInitialPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument initial principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentInitialPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Initial Principal Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentInitialPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Instrument Initial Principal Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TerminationPaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination payments received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TerminationPaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Termination payments received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets - finance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Right-of-Use Asset, after Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in assets and liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromBorrowingsUnderTermLoanAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Senior Unsecured Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromBorrowingsUnderTermLoanAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Borrowings Under Term Loan Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromBorrowingsUnderTermLoanAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow from borrowings under the term loan agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in-Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNoteMaturingInFebruaryTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C Note Maturing In February Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNoteMaturingInFebruaryTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series C Notes maturing in February 2025.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesCNoteMaturingInFebruaryTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Note Maturing in February 2025 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Real Estate Held For Sale [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Real Estate Held For Sale [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SummaryOfRealEstateHeldForSaleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of real estate held for sale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM FINANCING ACTIVITIES:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual commitment fee on undrawn funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Unused Capacity, Commitment Fee Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Measurements, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AssetRetirementObligationsRemovedFromBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset retirement obligations removed from balance sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AssetRetirementObligationsRemovedFromBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Retirement Obligations Removed From Balance Sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AssetRetirementObligationsRemovedFromBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The dollar amount of the asset retirement obligations related to underground storage tanks that were removed from the balance sheet.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update 2016-13</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2016-13 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounting Standards Update 2016-13 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Real estate held for use</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Investment Property Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyGross_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate amount as of the balance sheet date of real estate investment property including land and building and building improvements that are held for use before accumulated depreciation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: amount representing interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfRealEstatePropertiesFeeSimple_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of real estate properties, fee simple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfRealEstatePropertiesFeeSimple_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Real Estate Properties, Fee Simple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfRealEstatePropertiesFeeSimple_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Portfolio Segment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationObligationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Remediation Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationObligationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Obligations Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationObligationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for recording environmental remediation obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Components</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsOrPaymentsForConstructionInProcess_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Addition to construction in progress</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsOrPaymentsForConstructionInProcess_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Or Payments For Construction In Process</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsOrPaymentsForConstructionInProcess_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds or payments for construction in process.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongLivedAssetsMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real estate fair value, measurement input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongLivedAssetsMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Lived Assets Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LongLivedAssetsMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of input used to measure long lived assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OperatingCashFlowsForFinancingLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating cash flows for finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OperatingCashFlowsForFinancingLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Cash Flows For Financing Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OperatingCashFlowsForFinancingLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating cash flows for financing leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketForwardAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Forward Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketForwardAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">At the market forward agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Costs Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of cash paid for environmental remediation during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MortgageLoansOnRealEstateOriginalLoanAmountDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Loan Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MortgageLoansOnRealEstateOriginalLoanAmountDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Loan Amount [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative, Fair Value, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Fair Value, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of derivative instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Nonproduction, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation and amortization expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization, Nonproduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Financing Receivable, after Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Liabilities, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Amended and Restated MassMutual Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second Amended And Restated Mass Mutual Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedMassMutualAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Second Amended and Restated MassMutual Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.01 par value; 100,000,000 shares authorized; 61,932,369 and 59,815,921 shares issued and outstanding, respectively</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net earnings attributable to common stockholders used in diluted earnings per share calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Available to Common Stockholders, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasePrincipalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing cash flows for finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasePrincipalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Principal Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasePrincipalPayments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of finance lease liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility agreement, maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR Margin [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate SOFR Adjustment Margin [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secured overnight financing rate SOFR adjustment margin.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfCreditAgreementAndTermLoanAgreementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Credit Agreement And Term Loan Agreement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfCreditAgreementAndTermLoanAgreementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Credit Agreement And Term Loan Agreement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfCreditAgreementAndTermLoanAgreementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Credit Agreement And Term Loan Agreement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of Long-Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentySixForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand And Twenty Six Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentySixForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">February Two Thousand And Twenty Six Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FebruaryTwoThousandAndTwentySixForwardOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2026 Forward Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromSaleOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from dispositions of real estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromSaleOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Investment Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromSaleOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow from the sale of real estate owned for investment purposes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesAsSingleUnitTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of leased properties as single unit triple net leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesAsSingleUnitTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Leased Properties As Single Unit Triple Net Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLeasedPropertiesAsSingleUnitTripleNetLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of leased properties as single unit triple-net leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncrementalSharesFromEquityOfferingForwardAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental shares from Equity Offering forward agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncrementalSharesFromEquityOfferingForwardAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Incremental shares from Equity Offering forward agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNumberOfDefendants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of defendants in the MTBE complaint</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNumberOfDefendants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Number of Defendants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodCoveredByPollutionLegalLiabilityInsurancePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of years covered by the pollution legal liability insurance policy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodCoveredByPollutionLegalLiabilityInsurancePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pollution legal liability insurance policy duration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodCoveredByPollutionLegalLiabilityInsurancePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period Covered By Pollution Legal Liability Insurance Policy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfGlobalPartnersLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsidiaries of Global Partners LP (NYSE GLP) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfGlobalPartnersLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries Of Global Partners Lp [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SubsidiariesOfGlobalPartnersLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subsidiaries of Global Partners LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Expense (Income)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EnvironmentalRemediationExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Environmental remediation expense (income).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Business Acquisitions By Acquisition [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfIntangibleMarketLeaseAssetsAndLiabilitiesAndLeaseIncentives_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Intangible Market Lease Assets and Liabilities and Lease Incentives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfIntangibleMarketLeaseAssetsAndLiabilitiesAndLeaseIncentives_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of intangible market lease assets and liabilities and lease incentives.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfIntangibleMarketLeaseAssetsAndLiabilitiesAndLeaseIncentives_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of intangible market lease assets and liabilities and lease incentives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price allocated to buildings and improvements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Building</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Remediation Site</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Site [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfInvestmentInDirectFinancingLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of investment in direct financing leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfInvestmentInDirectFinancingLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Investment In Direct Financing Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmortizationOfInvestmentInDirectFinancingLease_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of the amortization of investment in direct financing leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impaired Long-Lived Assets Held and Used by Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Long-Lived Assets Held and Used by Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">SOFR</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventhAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seventh Amended and Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventhAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Seventh amended and restated prudential agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeventhAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Seventh Amended And Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesRemovedFromInception_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unknown reserve liabilities removed from inception</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesRemovedFromInception_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unknown reserve liabilities removed from inception.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfStatesInWhichPropertiesAreLocated_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of states in which our properties are located</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfStatesInWhichPropertiesAreLocated_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of States In Which Properties Are Located</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfStatesInWhichPropertiesAreLocated_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of states in which the company's properties, comprised of those that are owned and those that are leased from third party landlords, are located.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net Proceeds Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liability Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesKNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series K Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesKNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series K Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesKNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series K notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales-Type and Direct Financing Leases, Payment to be Received, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accumulated other comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfShareholdersEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Shareholders Equity [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfShareholdersEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Shareholders Equity [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfShareholdersEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Shareholders Equity [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityExtensionTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, extension term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityExtensionTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Extension Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LineOfCreditFacilityExtensionTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility, extension term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted, Number of RSUs Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Property acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate purchase price of properties acquired during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Commercial Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireCommercialRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments to Acquire Commercial Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Financing Receivable [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes and mortgages receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes And Mortgages Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NotesAndMortgagesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes and mortgages receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unknown reserve liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unknown reserve liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unknown Reserve Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Customer Security Deposits Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase (decrease) during the period in the amount of customer security deposits in financing activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security deposits received (refunded)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyWhoseConstructionIsCompletedInCurrentQuarter_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of property whose construction is completed in current quarter.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyWhoseConstructionIsCompletedInCurrentQuarter_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number Of property whose construction is completed in current quarter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyWhoseConstructionIsCompletedInCurrentQuarter_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Property Whose Construction Is Completed In Current Quarter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FifthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fifth Amended And Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FifthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fifth amended and restated prudential agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_FifthAmendedAndRestatedPrudentialAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fifth Amended and Restated Prudential Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued pursuant to equity offering/ATM Program, net, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued pursuant to Offering/Program net, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodDuringWhichContaminationDiscoveredThatCompanyIsResponsible_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">The maximum number of years during lease term during which contamination is discovered that the Company may be responsible for</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodDuringWhichContaminationDiscoveredThatCompanyIsResponsible_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period During Which Contamination Discovered That Company Is Responsible</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_PeriodDuringWhichContaminationDiscoveredThatCompanyIsResponsible_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The maximum number of years during lease term during which contamination is discovered that the Company may be responsible for.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Diluted earnings per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted net earnings per common share:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second Amended And Restated A I G Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Second Amended and Restated AIG Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SecondAmendedAndRestatedAIGAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Amended and Restated AIG Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accumulated other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermExcludingRenewalOptionsForThePropertiesPreviouslyLeasedToMarketing_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average remaining lease term, excluding renewal options, for the properties previously leased to marketing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermExcludingRenewalOptionsForThePropertiesPreviouslyLeasedToMarketing_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Remaining Lease Term, Excluding Renewal Options, for the Properties Previously Leased to Marketing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_WeightedAverageRemainingLeaseTermExcludingRenewalOptionsForThePropertiesPreviouslyLeasedToMarketing_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average remaining lease term, excluding renewal options, for the properties previously leased to marketing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnCondemnation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain (loss) on property condemnation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnCondemnation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Condemnation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Lines of Credit, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowings under credit agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowings from Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentAdditionalPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument additional principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentAdditionalPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Additional Principal Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentAdditionalPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument additional principal amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real estate held for sale at cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Held For Sale Property At Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateHeldForSalePropertyAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Real estate held for sale property, at cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Senior unsecured note, aggregate amount issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Face Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsiblePartiesIdentifiedForFinalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of potentially responsible parties that the EPA intends to enter into a final settlement agreement with</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsiblePartiesIdentifiedForFinalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Potentially Responsible Parties Identified For Final Settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPotentiallyResponsiblePartiesIdentifiedForFinalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of potentially responsible parties that the EPA intends to enter into a final settlement agreement with.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLongTermTripleNetLeasesInPortfolios_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of long-term triple-net leases during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLongTermTripleNetLeasesInPortfolios_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Long Term Triple Net Leases In Portfolios</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfLongTermTripleNetLeasesInPortfolios_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of long-term triple-net leases in portfolios.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OccidentalChemicalCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Occidental Chemical Corporation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OccidentalChemicalCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Occidental Chemical Corporation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OccidentalChemicalCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Occidental Chemical Corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateHeldforsale_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Real estate held for sale, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateHeldforsale_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real estate held for sale, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealEstateHeldforsale_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate, Held-for-Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest and Fee Income, Loans and Leases, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest on notes and mortgages receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest and Fee Income, Loans and Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwelveAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2012 ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwelveAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand and Twelve At The Market Equity Offering Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_TwoThousandAndTwelveAtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and twelve at the market equity offering program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DateOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Date One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DateOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Date one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_KnownEnvironmentalLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Known Environmental Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_KnownEnvironmentalLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Known Environmental Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_KnownEnvironmentalLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Known environmental liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleLeasebackTransactionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale Leaseback Transaction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleLeasebackTransactionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Leaseback Transaction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SaleLeasebackTransactionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale Leaseback Transaction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unknown reserve liabilities removed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unknown Reserve Liabilities Removed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UnknownReserveLiabilitiesRemoved_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unknown reserve liabilities removed.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, cash equivalents and restricted cash at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, cash equivalents and restricted cash at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCreditsToEnvironmentalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of credits to environmental expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCreditsToEnvironmentalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Of Credits To Environmental Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AmountOfCreditsToEnvironmentalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of credits to environmental expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UndergroundStorageTanksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">USTs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UndergroundStorageTanksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underground Storage Tanks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_UndergroundStorageTanksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underground storage tanks.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesINoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series I Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesINoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series I Note [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesINoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series I note.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Supplemental Cash Flow Information Related to Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Supplemental Cash Flow Information Related To Leases Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of supplemental cash flow information related to leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesRNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series R Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesRNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series R notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesRNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series R Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flow provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor, Operating Lease, Payment to be Received, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Information Related to Lease Costs for Finance and Operating Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Debt Issuance Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unamortized debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Equity Offering Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AtTheMarketEquityOfferingProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ATM program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedRemediationCostResponsiblePartyAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost estimate for remediating Lower Passaic River</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedRemediationCostResponsiblePartyAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Remediation Cost Responsible Party Allocation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_EstimatedRemediationCostResponsiblePartyAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The estimated remediation cost to be divided among responsible parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyCondemnation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Property Condemnation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyCondemnation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of property condemnation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfPropertyCondemnation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of property condemnation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSettlingParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of settling parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSettlingParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Settling Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSettlingParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of settling parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Contract [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesSettledUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares settled under forward provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesSettledUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of shares settled under forward provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesSettledUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares settled under forward provisions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_NumberOfSharesSettledUnderForwardProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares Settled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accrual for Environmental Loss Contingencies, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accrual for Environmental Loss Contingencies, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accrual for Environmental Loss Contingencies, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental remediation obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual for Environmental Loss Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Estate Taxes and other municipal charges paid then reimbursed by tenants included in revenues and expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Taxes And Other Municipal Charges Paid Then Reimbursed By Tenants Included In Revenues And Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The dollar amount of real estate taxes and other municipal charges paid by the company and then reimbursed by tenants included in revenues from rental properties and rental property expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DiscountedCashFlowMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Discounted Cash Flow Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DiscountedCashFlowMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Discounted Cash Flow Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DiscountedCashFlowMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Discounted cash flow method.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM OPERATING ACTIVITIES:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments of Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain from disposal of properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Sale of Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OtherComprehensiveIncomeLossCashFlowHedgeIncomeReclassifiedToInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other comprehensive income (loss) cash flow hedge income reclassified to interest expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OtherComprehensiveIncomeLossCashFlowHedgeIncomeReclassifiedToInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other comprehensive income (loss) cash flow hedge income reclassified to interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OtherComprehensiveIncomeLossCashFlowHedgeIncomeReclassifiedToInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flow hedge expense reclassified to interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Dividends declared per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Dividends, Per Share, Declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on dispositions of real estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gains (Losses) on Sales of Investment Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gains on dispositions of real estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AutoServiceCentersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auto Service Centers [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AutoServiceCentersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Auto Service Centers.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesIToKNoteMaturingInNovemberTwentyFiveTwoThousandThirtyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series I-K Notes Maturing in November 2030 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesIToKNoteMaturingInNovemberTwentyFiveTwoThousandThirtyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series I To K Note Maturing In November Twenty Five Two Thousand Thirty [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_SeriesIToKNoteMaturingInNovemberTwentyFiveTwoThousandThirtyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series I to K note maturing in November twenty five two thousand thirty.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrdinaryDividendPerSharePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular quarterly dividends paid per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrdinaryDividendPerSharePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ordinary Dividend Per Share Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_OrdinaryDividendPerSharePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of ordinary dividend paid during the period for each share of common stock outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromConstructionLoansPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from construction loans and development financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromConstructionLoansPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Construction Loans Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateRevenueRecognitionAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue recognition adjustments included in revenues from rental properties in continuing operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateRevenueRecognitionAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Revenue Recognition Adjustments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateRevenueRecognitionAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The total of non-cash adjustments recorded for deferred rental revenue due to the recognition of rental income on a straight-line basis over the current lease term, net amortization of above-market and below-market leases, and recognition of rental income recorded under direct financing leases using the effective interest rate method which produces a constant periodic rate of return on the net investments in the leased properties and the amortization of deferred lease incentives.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentRateIncreaseCreditAgreementDefault_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of rate increase in case of default</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentRateIncreaseCreditAgreementDefault_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Rate Increase Credit Agreement Default</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DebtInstrumentRateIncreaseCreditAgreementDefault_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase in basis points to the base interest rate in the event of a default on the credit agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock, net, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock Net Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_ProceedsFromIssuanceOfCommonStockNetShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock net shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction in progress</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in Progress, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_BusinessCombinationIncreaseDecreaseToReflectLiabilitiesAcquiredAtFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_BusinessCombinationIncreaseDecreaseToReflectLiabilitiesAcquiredAtFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average common shares outstanding:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDistributionsInExcessOfNetIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Distributions in Excess of Net Income, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDistributionsInExcessOfNetIncome_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends paid in excess of earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDistributionsInExcessOfNetIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Distributions in Excess of Net Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DeferredRentReceivableAndRevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition and Deferred Rent Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DeferredRentReceivableAndRevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Rent Receivable And Revenue Recognition Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_DeferredRentReceivableAndRevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for recording deferred rent receivable and recognizing revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForCapitalImprovements_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Capital expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForCapitalImprovements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Capital Improvements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued pursuant to dividend reinvestment, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyHeldForUseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Investment Property Held For Use Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyHeldForUseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Real estate held for use, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_RealEstateInvestmentPropertyHeldForUseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate amount as of the balance sheet date of real estate investment property including land and building and building improvements that are held for use, after accumulated depreciation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AggregateSalesPriceOfEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate sales price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AggregateSalesPriceOfEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Sales Price Of Equity Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="gty_AggregateSalesPriceOfEquityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate sales price of the equity offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="gty_DeferredCompensationFairValueLiabilityMember" xlink:to="gty_DeferredCompensationFairValueLiabilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingImprovementsMember" xlink:to="us-gaap_BuildingImprovementsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiability" xlink:to="us-gaap_FinanceLeaseLiability_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
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          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="gty_IncrementalSharesFromEquityOfferingForwardAgreements" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements" order="3" weight="1" use="optional"/>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsShareBasedCompensation" xlink:label="us-gaap_DividendsShareBasedCompensation"/>
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        <link:calculationLink xlink:type="extended" xlink:role="http://www.gettyrealty.com/20260630/taxonomy/role/Role_DisclosureAssetsHeldForSaleSummaryOfRealEstateHeldForSaleDetail">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealEstateHeldforsale" xlink:to="gty_RealEstateHeldForSalePropertyAtCost" order="0" weight="1.00" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealEstateHeldforsale" xlink:to="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization" order="1" weight="-1.00" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealEstateHeldforsale" xlink:label="us-gaap_RealEstateHeldforsale"/>
          <link:loc xlink:type="locator" xlink:href="gty-20260630.xsd#gty_RealEstateHeldForSalePropertyAtCost" xlink:label="gty_RealEstateHeldForSalePropertyAtCost"/>
          <link:loc xlink:type="locator" xlink:href="gty-20260630.xsd#gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization" xlink:label="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization"/>
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  </xsd:annotation>
  <xsd:element id="gty_SummaryOfRealEstateHeldForSaleLineItems" name="SummaryOfRealEstateHeldForSaleLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LeaseAssets" name="LeaseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_FebruaryTwoThousandAndTwentyThreeForwardOfferingMember" name="FebruaryTwoThousandAndTwentyThreeForwardOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_UnknownReserveLiabilitiesRemovedFromInception" name="UnknownReserveLiabilitiesRemovedFromInception" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ForwardStartingInterestRateSwapAgreementsMember" name="ForwardStartingInterestRateSwapAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfPotentiallyResponsibleParties" name="NumberOfPotentiallyResponsibleParties" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesLToNSToTNotesMaturingInFebruaryTwentyTwoTwoThousandThirtyTwoMember" name="SeriesLToNSToTNotesMaturingInFebruaryTwentyTwoTwoThousandThirtyTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_PropertiesLeasedToMarketingMember" name="PropertiesLeasedToMarketingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeventeenMileStretchOfLowerPassaicRiverMember" name="SeventeenMileStretchOfLowerPassaicRiverMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowanceForCreditLosses" name="CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowanceForCreditLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_RealEstateHeldForSalePropertyAtCost" name="RealEstateHeldForSalePropertyAtCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_SeriesCNoteMaturingInFebruaryTwoThousandTwentyFiveMember" name="SeriesCNoteMaturingInFebruaryTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfSharesAllowedForSaleUnderForwardProvisions" name="NumberOfSharesAllowedForSaleUnderForwardProvisions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_MetLifeAgreementMember" name="MetLifeAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SecondAmendedAndRestatedAIGAgreementMember" name="SecondAmendedAndRestatedAIGAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AmountAgreedBySettlingPartiesToEpa" name="AmountAgreedBySettlingPartiesToEpa" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_DirectFinancingLeasesPolicyTextBlock" name="DirectFinancingLeasesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_PropertiesAcquiredOnJune2022Member" name="PropertiesAcquiredOnJune2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfDefendantsUnderComplaint" name="NumberOfDefendantsUnderComplaint" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LineOfCreditFacilityOptionalExtendedMaturityDate" name="LineOfCreditFacilityOptionalExtendedMaturityDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesGNotesMember" name="SeriesGNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_PollutionLegalLiabilityInsurancePolicyAggregateLimit" name="PollutionLegalLiabilityInsurancePolicyAggregateLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_AtTheMarketEquityOfferingProgramMember" name="AtTheMarketEquityOfferingProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_UnauditedInterimConsolidatedFinancialStatementsPolicyTextBlock" name="UnauditedInterimConsolidatedFinancialStatementsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LeaseLiabilities" name="LeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_FutureEnvironmentalLiabilitiesForPreexistingUnknownContaminationMember" name="FutureEnvironmentalLiabilitiesForPreexistingUnknownContaminationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreements" name="RemainingNumberOfSharesSubjectToForwardSaleAgreements" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesOToQNoteMaturingInJanuaryTwentyTwoThousandThirtyThreeMember" name="SeriesOToQNoteMaturingInJanuaryTwentyTwoThousandThirtyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ImpairedRealEstateAssetsFairValueDisclosure" name="ImpairedRealEstateAssetsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_LowerPassaicRiverMember" name="LowerPassaicRiverMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NotesAndMortgagesReceivable" name="NotesAndMortgagesReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_PropertiesAcquiredInSeparateTransactionsMember" name="PropertiesAcquiredInSeparateTransactionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_InvestmentBuildingsAndImprovementsGross" name="InvestmentBuildingsAndImprovementsGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_SupplementalCashFlowInformationRelatedToLeaseAbstract" name="SupplementalCashFlowInformationRelatedToLeaseAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SixthAmendedAndRestatedPrudentialAgreementMember" name="SixthAmendedAndRestatedPrudentialAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EightMileStretchOfLowerPassaicRiverMember" name="EightMileStretchOfLowerPassaicRiverMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_IncrementalSharesFromEquityOfferingForwardAgreements" name="IncrementalSharesFromEquityOfferingForwardAgreements" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_CreditAndLoanAgreementLineItems" name="CreditAndLoanAgreementLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ThirdPartyLandlordsMember" name="ThirdPartyLandlordsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CarWashPropertiesUnderConstructionMember" name="CarWashPropertiesUnderConstructionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_UnknownReserveLiabilitiesRemoved" name="UnknownReserveLiabilitiesRemoved" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NumberOfPotentiallyResponsiblePartiesIdentifiedForFinalSettlement" name="NumberOfPotentiallyResponsiblePartiesIdentifiedForFinalSettlement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_NumberOfPropertiesHeldForSale" name="NumberOfPropertiesHeldForSale" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_UnknownReserveLiabilities" name="UnknownReserveLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_TermLoanMember" name="TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_WeightedAverageRemainingLeaseTermExcludingRenewalOptionsForThePropertiesPreviouslyLeasedToMarketing" name="WeightedAverageRemainingLeaseTermExcludingRenewalOptionsForThePropertiesPreviouslyLeasedToMarketing" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LineOfCreditFacilityExtensionTerm" name="LineOfCreditFacilityExtensionTerm" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_PeriodDuringWhichContaminationDiscoveredThatCompanyIsResponsible" name="PeriodDuringWhichContaminationDiscoveredThatCompanyIsResponsible" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_EstimatedRemediationCostResponsiblePartyAllocation" name="EstimatedRemediationCostResponsiblePartyAllocation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_IncreaseDecreaseInCashHeldForPropertyAcquisitions" name="IncreaseDecreaseInCashHeldForPropertyAcquisitions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_AccruedLegalMatters" name="AccruedLegalMatters" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_AccrualForEnvironmentalLossContingenciesKnownReserveLiabilities" name="AccrualForEnvironmentalLossContingenciesKnownReserveLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_ProceedsFromIssuanceOfCommonStockNetShares" name="ProceedsFromIssuanceOfCommonStockNetShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_NumberOfRemainingSettlingParties" name="NumberOfRemainingSettlingParties" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesSNotesMember" name="SeriesSNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DiscountedCashFlowMethodMember" name="DiscountedCashFlowMethodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfPropertiesVacant" name="NumberOfPropertiesVacant" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_AtTheMarketDirectIssuancesProgramMember" name="AtTheMarketDirectIssuancesProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_UnamortizedDebtIssuanceCosts" name="UnamortizedDebtIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_EstimatedCostOfDredgingAndCappingToControlSedimentSourcesOfDioxinAndPcbs" name="EstimatedCostOfDredgingAndCappingToControlSedimentSourcesOfDioxinAndPcbs" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NumberOfPropertiesUnderRedevelopment" name="NumberOfPropertiesUnderRedevelopment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesCNotesMember" name="SeriesCNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_PeriodCoveredByPollutionLegalLiabilityInsurancePolicy" name="PeriodCoveredByPollutionLegalLiabilityInsurancePolicy" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesNNotesMember" name="SeriesNNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_GettyPetroleumMarketingIncMember" name="GettyPetroleumMarketingIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LeasesDisclosureTextBlock" name="LeasesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_UndergroundStorageTanksMember" name="UndergroundStorageTanksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LongLivedAssetsMeasurementInput" name="LongLivedAssetsMeasurementInput" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesUNotesMember" name="SeriesUNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AmortizationOfIntangibleMarketLeaseAssetsAndLiabilitiesAndLeaseIncentives" name="AmortizationOfIntangibleMarketLeaseAssetsAndLiabilitiesAndLeaseIncentives" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_NumberOfLongTermTripleNetLeasesInPortfolios" name="NumberOfLongTermTripleNetLeasesInPortfolios" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_ScheduleOfSignificantTenantsByRevenueTableTextBlock" name="ScheduleOfSignificantTenantsByRevenueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_NumberOfPropertiesPreviouslyLeased" name="NumberOfPropertiesPreviouslyLeased" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_LookbackPeriod" name="LookbackPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_CostsAndExpensesBeforeGainsLossesFromSaleOfProperties" name="CostsAndExpensesBeforeGainsLossesFromSaleOfProperties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_DescriptionOfLessorLeasingArrangements" name="DescriptionOfLessorLeasingArrangements" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_RealEstateNonCashAdjustments" name="RealEstateNonCashAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_FirstAmendedAndRestatedMassMutualAgreementMember" name="FirstAmendedAndRestatedMassMutualAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CapitalizedAssetRetirementCostsMember" name="CapitalizedAssetRetirementCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_IncreaseInCarryingValueOfProperty" name="IncreaseInCarryingValueOfProperty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived" name="CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses" name="RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ShareholdersEquityLineItems" name="ShareholdersEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SaleOfCommonStockAverageGrossOfferingPrice" name="SaleOfCommonStockAverageGrossOfferingPrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities" name="IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NumberOfSettlingParties" name="NumberOfSettlingParties" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_UnknownReserveLiabilitiesPreviouslyRemoved" name="UnknownReserveLiabilitiesPreviouslyRemoved" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_FirstAmendedAndRestatedAIGAgreementMember" name="FirstAmendedAndRestatedAIGAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NotesAndMortgagesReceivablePolicyTextBlock" name="NotesAndMortgagesReceivablePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_ExpressTunnelCarWashesUnderConstructionMember" name="ExpressTunnelCarWashesUnderConstructionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LeasesTable" name="LeasesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_PartiesToPerformRemedialInvestigationAndFeasibilityStudy" name="PartiesToPerformRemedialInvestigationAndFeasibilityStudy" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_PeriodOfSuccessiveRenewalTermsUnderUnitaryTripleNetLeaseAgreements" name="PeriodOfSuccessiveRenewalTermsUnderUnitaryTripleNetLeaseAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_UnderwritersOptionToPurchaseMember" name="UnderwritersOptionToPurchaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses" name="CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NotesAndMortgagesReceivableMember" name="NotesAndMortgagesReceivableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_RevolvingFacilityOptionalExtensionPeriod" name="RevolvingFacilityOptionalExtensionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_ProceedsFromBorrowingsUnderTermLoanAgreements" name="ProceedsFromBorrowingsUnderTermLoanAgreements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ReasonablyEstimableEnvironmentalRemediationObligationMember" name="ReasonablyEstimableEnvironmentalRemediationObligationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DeferredCompensationFairValueLiabilityMember" name="DeferredCompensationFairValueLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfLeasedPropertiesAsSingleUnitTripleNetLeases" name="NumberOfLeasedPropertiesAsSingleUnitTripleNetLeases" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_OtherComprehensiveIncomeLossCashFlowHedgeIncomeReclassifiedToInterestExpense" name="OtherComprehensiveIncomeLossCashFlowHedgeIncomeReclassifiedToInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_LineOfCreditCarryingValue" name="LineOfCreditCarryingValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_LeaseLiabilitiesAbstract" name="LeaseLiabilitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ScheduleOfCreditAgreementAndTermLoanAgreementTable" name="ScheduleOfCreditAgreementAndTermLoanAgreementTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityTableTextBlock" name="FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue" name="AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_AverageRemainingLeaseTermUnderUnitaryTripleNetLeaseAgreements" name="AverageRemainingLeaseTermUnderUnitaryTripleNetLeaseAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesIToKNoteMaturingInNovemberTwentyFiveTwoThousandThirtyMember" name="SeriesIToKNoteMaturingInNovemberTwentyFiveTwoThousandThirtyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EnvironmentalProtectionAgencyMember" name="EnvironmentalProtectionAgencyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DeferredRentReceivableAndRevenueRecognitionPolicyTextBlock" name="DeferredRentReceivableAndRevenueRecognitionPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour" name="LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_CarWashPropertiesMember" name="CarWashPropertiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_MethylTertiaryButylEtherMember" name="MethylTertiaryButylEtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_IncomeStatementLeaseRevenue" name="IncomeStatementLeaseRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_FinanceLeaseCostsAbstract" name="FinanceLeaseCostsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeventhAmendedAndRestatedPrudentialAgreementMember" name="SeventhAmendedAndRestatedPrudentialAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ExpressTunnelCarWashesMember" name="ExpressTunnelCarWashesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesTNotesMember" name="SeriesTNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ProceedsFromIssuanceOfCommonStockAtmProgram" name="ProceedsFromIssuanceOfCommonStockAtmProgram" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ProceedsOrPaymentsForConstructionInProcess" name="ProceedsOrPaymentsForConstructionInProcess" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_PaymentsInSettlementOfRestrictedStockUnits" name="PaymentsInSettlementOfRestrictedStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_SeriesONotesMember" name="SeriesONotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AutoServiceCentersMember" name="AutoServiceCentersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DividendsPaidInExcessOfEarningsMember" name="DividendsPaidInExcessOfEarningsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfStatesInWhichPropertiesAreLocated" name="NumberOfStatesInWhichPropertiesAreLocated" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_TerminationPaymentsReceived" name="TerminationPaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_UpperNineMileIrRodMember" name="UpperNineMileIrRodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AmendedAndRestatedTwoThousandAndFourOmnibusIncentiveCompensationPlanMember" name="AmendedAndRestatedTwoThousandAndFourOmnibusIncentiveCompensationPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EstimatedSalePriceMethodMember" name="EstimatedSalePriceMethodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeniorUnsecuredNotesMember" name="SeniorUnsecuredNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NetAssetRetirementCostsRemoved" name="NetAssetRetirementCostsRemoved" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NumberOfLeasedPropertiesSubjectToLongTermTripleNetLeases" name="NumberOfLeasedPropertiesSubjectToLongTermTripleNetLeases" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LineOfCreditFacilityMaturityDate" name="LineOfCreditFacilityMaturityDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_AssetRetirementObligationsRemovedFromBalanceSheet" name="AssetRetirementObligationsRemovedFromBalanceSheet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_AtTheMarketForwardAgreementsMember" name="AtTheMarketForwardAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_MutualFundsFairValueAssetMember" name="MutualFundsFairValueAssetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DescriptionOfAllocationMethodologyApprovedByEpa" name="DescriptionOfAllocationMethodologyApprovedByEpa" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesJNotesMember" name="SeriesJNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesBNotesMember" name="SeriesBNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfPropertiesInPortfolio" name="NumberOfPropertiesInPortfolio" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_ComprehensiveEnvironmentalResponseCompensationAndLiabilityActMember" name="ComprehensiveEnvironmentalResponseCompensationAndLiabilityActMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LeasesLineItems" name="LeasesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesINoteMember" name="SeriesINoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_OccidentalChemicalCorporationMember" name="OccidentalChemicalCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SixPropertiesMember" name="SixPropertiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AccrualForEnvironmentalLossContingenciesInflationAdjustmentRate" name="AccrualForEnvironmentalLossContingenciesInflationAdjustmentRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_RealEstateRevenueRecognitionAdjustments" name="RealEstateRevenueRecognitionAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_DebtInstrumentInitialPrincipalAmount" name="DebtInstrumentInitialPrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_ChangesInEnvironmentalEstimates" name="ChangesInEnvironmentalEstimates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_SaleLeasebackTransactionMember" name="SaleLeasebackTransactionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ProceedsFromIssuanceOfCommonStockNetEquityOffering" name="ProceedsFromIssuanceOfCommonStockNetEquityOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_AccrualForEnvironmentalLossContingenciesUnknownReserveLiabilities" name="AccrualForEnvironmentalLossContingenciesUnknownReserveLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_ProceedsFromIssuanceOfCommonStockNetValue" name="ProceedsFromIssuanceOfCommonStockNetValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_RealEstateForLessorPolicyTextBlock" name="RealEstateForLessorPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_FebruaryTwoThousandAndTwentySixForwardOfferingMember" name="FebruaryTwoThousandAndTwentySixForwardOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_LiborMember" name="LiborMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SecuredOvernightFinancingRateSofrAdjustmentMember" name="SecuredOvernightFinancingRateSofrAdjustmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesLNotesMember" name="SeriesLNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_MaximumLeaseCommitmentForCapitalExpenditure" name="MaximumLeaseCommitmentForCapitalExpenditure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_ConvenienceStoresMember" name="ConvenienceStoresMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AboveMarketLeaseAcquired" name="AboveMarketLeaseAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_SeriesFToHRNotesMaturingInSeptemberTwoThousandTwentyNineMember" name="SeriesFToHRNotesMaturingInSeptemberTwoThousandTwentyNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EnvironmentalRemediationExpenseIncome" name="EnvironmentalRemediationExpenseIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_IssuanceOfNotesAndMortgagesReceivable" name="IssuanceOfNotesAndMortgagesReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_RealEstateInvestmentPropertyHeldForUseNet" name="RealEstateInvestmentPropertyHeldForUseNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_NumberOfPropertiesSold" name="NumberOfPropertiesSold" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_RemainingNumberOfSharesSubjectToForwardSaleAgreement" name="RemainingNumberOfSharesSubjectToForwardSaleAgreement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_ProceedsFromSaleOfInvestmentRealEstate" name="ProceedsFromSaleOfInvestmentRealEstate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_EnvironmentalRemediationCostsPaid" name="EnvironmentalRemediationCostsPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_SeriesMNotesMember" name="SeriesMNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesRNotesMember" name="SeriesRNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NewYorkLifeAgreementMember" name="NewYorkLifeAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_MultiplePurchasersPartyAgreementMember" name="MultiplePurchasersPartyAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock" name="ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_DepreciationAndAmortizationForCapitalizedAssetRetirementCosts" name="DepreciationAndAmortizationForCapitalizedAssetRetirementCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DebtInstrumentRateIncreaseCreditAgreementDefault" name="DebtInstrumentRateIncreaseCreditAgreementDefault" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_LeaseAssetsAbstract" name="LeaseAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfPropertyCondemnation" name="NumberOfPropertyCondemnation" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SecondAmendedAndRestatedMassMutualAgreementMember" name="SecondAmendedAndRestatedMassMutualAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfLeaseTermination" name="NumberOfLeaseTermination" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_NumberOfLeasedProperties" name="NumberOfLeasedProperties" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_NumberOfPropertyWhoseConstructionIsCompleted" name="NumberOfPropertyWhoseConstructionIsCompleted" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_PrepaidExpensesAndOtherAssetsMember" name="PrepaidExpensesAndOtherAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_PeriodOfInitialTermUnderUnitaryTripleNetLeaseAgreements" name="PeriodOfInitialTermUnderUnitaryTripleNetLeaseAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_CollectionOfNotesAndMortgagesReceivable" name="CollectionOfNotesAndMortgagesReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_FifthAmendedAndRestatedPrudentialAgreementMember" name="FifthAmendedAndRestatedPrudentialAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesDAndENoteMaturingInJuneTwoThousandTwentyEightMember" name="SeriesDAndENoteMaturingInJuneTwoThousandTwentyEightMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AdditionalPaymentsToAcquireCommercialRealEstate" name="AdditionalPaymentsToAcquireCommercialRealEstate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_OrdinaryDividendPerSharePaid" name="OrdinaryDividendPerSharePaid" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesUNoteMaturingInJanuaryTwentyTwoThousandThirtySixMember" name="SeriesUNoteMaturingInJanuaryTwentyTwoThousandThirtySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_ScheduleOfShareholdersEquityTable" name="ScheduleOfShareholdersEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EstimatedMaximumRemainingUsefulLifeOfUndergroundStorageTankCapitalizedAssetRetirementCosts" name="EstimatedMaximumRemainingUsefulLifeOfUndergroundStorageTankCapitalizedAssetRetirementCosts" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesKNotesMember" name="SeriesKNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_IncreaseDecreaseInDeferredRentReceivable" name="IncreaseDecreaseInDeferredRentReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_SeriesDNotesMember" name="SeriesDNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_TwoThousandAndTwentyOneAtTheMarketEquityOfferingProgramMember" name="TwoThousandAndTwentyOneAtTheMarketEquityOfferingProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_JulyTwoThousandAndTwentyFourForwardOfferingMember" name="JulyTwoThousandAndTwentyFourForwardOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesFNotesMember" name="SeriesFNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesPNotesMember" name="SeriesPNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DividendsDeclaredButNotYetPaid" name="DividendsDeclaredButNotYetPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_NumberOfEntitiesToWhichGeneralNoticeLettersIssued" name="NumberOfEntitiesToWhichGeneralNoticeLettersIssued" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SeriesHNotesMember" name="SeriesHNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted" name="NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_NumberOfSharesSettledUnderForwardProvisions" name="NumberOfSharesSettledUnderForwardProvisions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityAbstract" name="FinanceLeaseLiabilityAndOperatingLeaseLiabilityMaturityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AmountOfCashPayoutOwedByResponsibleParties" name="AmountOfCashPayoutOwedByResponsibleParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_BusinessCombinationIncreaseDecreaseToReflectLiabilitiesAcquiredAtFairValueAbstract" name="BusinessCombinationIncreaseDecreaseToReflectLiabilitiesAcquiredAtFairValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization" name="RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_AggregateSalesPriceOfEquityOffering" name="AggregateSalesPriceOfEquityOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_NumberOfPropertiesLeasedFromLandlords" name="NumberOfPropertiesLeasedFromLandlords" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="gty_AcquisitionOfRealEstateAssetsUnderConstructionMember" name="AcquisitionOfRealEstateAssetsUnderConstructionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_DriveThruQSRsMember" name="DriveThruQSRsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SubsidiariesOfGlobalPartnersLpMember" name="SubsidiariesOfGlobalPartnersLpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_WeightedAverageDiscountRateAbstract" name="WeightedAverageDiscountRateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_KnownEnvironmentalLiabilitiesMember" name="KnownEnvironmentalLiabilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SecuredOvernightFinancingRateSofrAdjustmentMarginMember" name="SecuredOvernightFinancingRateSofrAdjustmentMarginMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesENotesMember" name="SeriesENotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_EnvironmentalRemediationObligationsPolicyTextBlock" name="EnvironmentalRemediationObligationsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_DebtInstrumentAdditionalPrincipalAmount" name="DebtInstrumentAdditionalPrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_PropertyPreviouslyDisposedMember" name="PropertyPreviouslyDisposedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SummaryOfRealEstateHeldForSaleTable" name="SummaryOfRealEstateHeldForSaleTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_OperatingCashFlowsForFinancingLeases" name="OperatingCashFlowsForFinancingLeases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_DateOneMember" name="DateOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AnticipatedGrossProceedsRemaining" name="AnticipatedGrossProceedsRemaining" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_AmortizationOfInvestmentInDirectFinancingLease" name="AmortizationOfInvestmentInDirectFinancingLease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_FinanceLeaseLiabilityPaymentsDueAfterYearFour" name="FinanceLeaseLiabilityPaymentsDueAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_PropertyPlantAndEquipmentAssumedHoldingPeriods" name="PropertyPlantAndEquipmentAssumedHoldingPeriods" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" name="OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowancesReductionsForCreditLosses" name="CapitalLeasesNetInvestmentInDirectFinancingLeasesIncreaseDecreaseInAllowancesReductionsForCreditLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="gty_FollowOnPublicOfferingMember" name="FollowOnPublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_SeriesQNotesMember" name="SeriesQNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_RealEstateInvestmentPropertyGross" name="RealEstateInvestmentPropertyGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="gty_PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs" name="PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_SubsidiariesOfARKOCorpMember" name="SubsidiariesOfARKOCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_NumberOfPropertyWhoseConstructionIsCompletedInCurrentQuarter" name="NumberOfPropertyWhoseConstructionIsCompletedInCurrentQuarter" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="gty_AccumulationOfAssetRetirementCostMethodMember" name="AccumulationOfAssetRetirementCostMethodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_TwoThousandAndTwelveAtTheMarketEquityOfferingProgramMember" name="TwoThousandAndTwelveAtTheMarketEquityOfferingProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="gty_AmountOfCreditsToEnvironmentalExpenses" name="AmountOfCreditsToEnvironmentalExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
</xsd:schema>
