Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFive0OriginatedFourFiscalYearsBeforeCurrentFiscalYearAmortizedCosts
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net investment in lease and financing receivable, Year Five, originate four years prior to current fiscal year

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFiveOriginateFourYearsPriorToCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Five, Originated, Four Fiscal Years before Current Fiscal Year, Allowance For Credit Loss

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFiveOriginatedFourFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLoss
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Five, Originated, Four Fiscal Years before Current Fiscal Year, Allowance For Credit Loss, Percentage

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFiveOriginatedFourFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLossPercentage
Namespace Prefix:	glpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Net investment in lease and financing receivable, Year Four, originate three years prior to current fiscal year

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFourOriginateThreeYearsPriorToCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Four, Originated, Three Fiscal Years before Current Fiscal Year, Allowance For Credit Loss

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFourOriginatedThreeFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLoss
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Net investment in lease and financing receivable, Year Four, Originated, Three Fiscal Years before Current Fiscal Year, Amortized Costs ,

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFourOriginatedThreeFiscalYearsBeforeCurrentFiscalYearAmortizedCosts
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Four, Originated, Three Fiscal Years before Current Fiscal Year, Allowance For Credit Loss, Percentage

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearFourOriginatedTwoFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLossPercentage
Namespace Prefix:	glpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Net investment in lease and financing receivable, Year Six, originate five years prior to current fiscal year

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearSixOriginateFourYearsPriorToCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Six Originated, Five Fiscal Years before Current Fiscal Year, Allowance For Credit Loss, Percentage

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearSixOriginatedFiveFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLossPercentage
Namespace Prefix:	glpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Six, Originated, Five Fiscal Years before Current Fiscal Year, Allowance For Credit Loss

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearSixOriginatedFourFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLoss
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Net investment in lease and financing receivable, Year Six, Originated, Five Fiscal Years before Current Fiscal Year, Amortized Costs ,

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearSixOriginatedFourFiscalYearsBeforeCurrentFiscalYearAmortizedCosts
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net investment in lease and financing receivable, Year Three, Originated Two Fiscal Years before Current Fiscal Year

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearThreeOriginateTwoYearsPriorToCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Three, Originated, Two Fiscal Years before Current Fiscal Year, Allowance For Credit Loss

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearThreeOriginatedTwoFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLoss
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Three, Originated, Two Fiscal Years before Current Fiscal Year, Allowance For Credit Loss, Percentage

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearThreeOriginatedTwoFiscalYearsBeforeCurrentFiscalYearAllowanceForCreditLossPercentage
Namespace Prefix:	glpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Net investment in lease and financing receivable, Year Three, Originated, Two Fiscal Years before Current Fiscal Year, Amortized Cost

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearThreeOriginatedTwoFiscalYearsBeforeCurrentFiscalYearAmortizedCosts
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Allowance For Credit Loss

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLoss
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Allowance For Credit Loss, Percentage

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLossPercentage
Namespace Prefix:	glpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Net Investment in Lease and Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Amortized Cost

No definition available.

Name:	glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAmortizedCost
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net Investment in Sales Type Lease, Year Three ,Originated. Two Fiscal Years before Current Fiscal Year

No definition available.

Name:	glpi_NetInvestmentInSalesTypeLeaseYearThreeOriginated.TwoFiscalYearsBeforeCurrentFiscalYear
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales-Type And Direct Financing Leases, Lease Receivable, To Be Received, After Year Four

No definition available.

Name:	glpi_SalesTypeAndDirectFinancingLeasesLeaseReceivableToBeReceivedAfterYearFour
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payment to be received, Year 4

No definition available.

Name:	glpi_SalesTypeLeasePaymentToBeReceivedYear4
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payments to be Received

No definition available.

Name:	glpi_SalesTypeLeasePaymentsToBeReceived
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payments to be received, after Year 4

No definition available.

Name:	glpi_SalesTypeLeasePaymentsToBeReceivedAfterYear4
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payments to be received, Year 2

No definition available.

Name:	glpi_SalesTypeLeasePaymentsToBeReceivedYear2
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payments to be received, Year 3

No definition available.

Name:	glpi_SalesTypeLeasePaymentsToBeReceivedYear3
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Sales Type Lease, Payments to be received, Year One

No definition available.

Name:	glpi_SalesTypeLeasePaymentsToBeReceivedYearOne
Namespace Prefix:	glpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_InvestmentsAllOtherInvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-10

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in 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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-10

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in next 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).

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in remainder of current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-10

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in third 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).

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in second 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).