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  <xs:element name="DescriptionOfAccountingPoliciesForPrinciplesOfConsolidationTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DescriptionOfAccountingPoliciesForPrinciplesOfConsolidationTextBlock"/> 
  <xs:element name="DescriptionOfAccountingPolicyForJointArrangementsTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DescriptionOfAccountingPolicyForJointArrangementsTextBlock"/> 
  <xs:element name="DescriptionOfAccountingPolicyForProvisionAndContingentLiabilitiesTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DescriptionOfAccountingPolicyForProvisionAndContingentLiabilitiesTextBlock"/>   
  <xs:element name="DescriptionOfAccountingPolicyForStandardsIssuedButNotEffectiveTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DescriptionOfAccountingPolicyForStandardsIssuedButNotEffectiveTextBlock"/>  
  <xs:element name="DisclosureOfInventoriesTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfInventoriesTableTextBlock"/>    
  <xs:element name="DisclosureOfIncomeTaxExpenseTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfIncomeTaxExpenseTextBlock"/>    
  <xs:element name="DisclosureOfMinimumHedgingRequirementsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfMinimumHedgingRequirementsTableTextBlock"/>    
  <xs:element name="DisclosureOfLeaseLiabilitiesExplanatoryTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfLeaseLiabilitiesExplanatoryTableTextBlock"/> 
  <xs:element name="DisclosureOfReconsilationOfDecommissioningLiabilitiesTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfReconsilationOfDecommissioningLiabilitiesTextBlock"/>    
  <xs:element name="DisclosureOfReconcilesTheWarrantLiabilityTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfReconcilesTheWarrantLiabilityTextBlock"/>     
  <xs:element name="DisclosureOfFairValueOfEachWarrantWasEstimatedOnItsGrantDateUsingTheBlackScholesMertonValuationModelTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfFairValueOfEachWarrantWasEstimatedOnItsGrantDateUsingTheBlackScholesMertonValuationModelTextBlock"/>   
  <xs:element name="DisclosureOfSummarizedChangesToTheCompanysCommonShareCapitalTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfSummarizedChangesToTheCompanysCommonShareCapitalTableTextBlock"/>   
  <xs:element name="DisclosureOfFinancingAndInterestTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfFinancingAndInterestTextBlock"/>  
  <xs:element name="DisclosureOfGrossAssetAndLiabilityPositionsOfTheCompanysIndividualRiskManagementContractTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfGrossAssetAndLiabilityPositionsOfTheCompanysIndividualRiskManagementContractTextBlock"/>    
  <xs:element name="DisclosureOfFinancialCommodityRiskManagementContractsTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfFinancialCommodityRiskManagementContractsTextBlock"/>    
  <xs:element name="DisclosureOfCommitmentsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfCommitmentsTableTextBlock"/>    
  <xs:element name="DisclosureOfAccountsPayableAndAccruedLiabilities" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DisclosureOfAccountsPayableAndAccruedLiabilities"/> 
  <xs:element name="FinancialInstrumentClassification" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FinancialInstrumentClassification"/>     
  <xs:element name="OilInventories" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_OilInventories"/>     
  <xs:element name="EmissionsCreditsHeldForUse" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_EmissionsCreditsHeldForUse"/>    
  <xs:element name="PropertyPlantandEquipmentPPEScheduleofPropertyPlantandEquipmentPPEDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_PropertyPlantandEquipmentPPEScheduleofPropertyPlantandEquipmentPPEDetailsTable"/>    
  <xs:element name="ChangeInDecommissioningLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInDecommissioningLiabilities"/> 
  <xs:element name="RemeasurementOfRightofuseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RemeasurementOfRightofuseAssets"/>     
  <xs:element name="AccumulatedDepletionDepreciationandAmortizationBalance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccumulatedDepletionDepreciationandAmortizationBalance"/> 
  <xs:element name="ExpectedStatutoryIncomeTaxRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ExpectedStatutoryIncomeTaxRate"/>   
  <xs:element name="GainOnWarrantRevaluation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_GainOnWarrantRevaluation"/>  
  <xs:element name="CapitalGainOnDebtSettlementinDollars" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CapitalGainOnDebtSettlementinDollars"/> 
  <xs:element name="GainOnBusinessCombination" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_GainOnBusinessCombination"/>    
  <xs:element name="OtherPermanentDifferences" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_OtherPermanentDifferences"/>    
  <xs:element name="ChangeInUnrecognizedDeferredTaxAsset" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInUnrecognizedDeferredTaxAsset"/>     
  <xs:element name="DeferredIncomeTaxExpensePropertyPlantampEquipment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DeferredIncomeTaxExpensePropertyPlantampEquipment"/> 
  <xs:element name="CorporateCapitalTaxLossesCarriedForward" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CorporateCapitalTaxLossesCarriedForward"/> 
  <xs:element name="DeferredTaxAssetLiabilityRiskManagementContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DeferredTaxAssetLiabilityRiskManagementContracts"/>   
  <xs:element name="DeferredTaxAssetsShareIssuanceCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DeferredTaxAssetsShareIssuanceCosts"/>  
  <xs:element name="DeferredTaxAssetLiabilityLongTermDebt" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DeferredTaxAssetLiabilityLongTermDebt"/>  
  <xs:element name="ChangeinTaxAssetRecognizedShareIssuanceCostsEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeinTaxAssetRecognizedShareIssuanceCostsEquity"/>   
  <xs:element name="IncomeTaxesScheduleofTaxableIncomeDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_IncomeTaxesScheduleofTaxableIncomeDetailsTable"/>     
  <xs:element name="AdjustmentForDifferencesInProvincialIncomeTaxPools" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AdjustmentForDifferencesInProvincialIncomeTaxPools"/>   
  <xs:element name="CombinedFederalAndProvincialIncomeTaxPools" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CombinedFederalAndProvincialIncomeTaxPools"/>   
  <xs:element name="AmountOfUnamortizedFinancingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AmountOfUnamortizedFinancingCosts"/>    
  <xs:element name="PrincipalAmountOfRedemptionPayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_PrincipalAmountOfRedemptionPayments"/>   
  <xs:element name="UnamortizedFinancingCostsOfRedemptionPayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnamortizedFinancingCostsOfRedemptionPayments"/>   
  <xs:element name="LongtermDebtRedemptionPayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LongtermDebtRedemptionPayments"/>   
  <xs:element name="PrincipalAmountOfNoncashFinancingExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_PrincipalAmountOfNoncashFinancingExpense"/>   
  <xs:element name="UnamortizedFinancingCostsOfNoncashFinancingExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnamortizedFinancingCostsOfNoncashFinancingExpense"/>   
  <xs:element name="LongtermDebtNoncashFinancingExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LongtermDebtNoncashFinancingExpense"/>   
  <xs:element name="PrincipalAmountOfForeignCurrencyExchangeRateTranslation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_PrincipalAmountOfForeignCurrencyExchangeRateTranslation"/>   
  <xs:element name="UnamortizedFinancingCostsOfForeignExchange" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnamortizedFinancingCostsOfForeignExchange"/>  
  <xs:element name="LongtermDebtForeignCurrencyExchangeRateTranslation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LongtermDebtForeignCurrencyExchangeRateTranslation"/>   
  <xs:element name="LeaseLiabilityAdditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LeaseLiabilityAdditions"/>    
  <xs:element name="RightOfUseAssetsLeaseModificationsAndTerminations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RightOfUseAssetsLeaseModificationsAndTerminations"/>  
  <xs:element name="LeaseLiabilitiesandOtherScheduleofMinimumLeasePaymentsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_LeaseLiabilitiesandOtherScheduleofMinimumLeasePaymentsDetailsTable"/>     
  <xs:element name="DecommissioningLiabilitiesAcquisitions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningLiabilitiesAcquisitions"/>    
  <xs:element name="DecommissioningLiabilitiesIncurred" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningLiabilitiesIncurred"/>  
  <xs:element name="DecommissioningLiabilitiesChangeInEstimates" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningLiabilitiesChangeInEstimates"/>    
  <xs:element name="DecommissioningCostsIncurred" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningCostsIncurred"/>    
  <xs:element name="AccretionExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccretionExpenses"/>  
  <xs:element name="WarrantLiabilityScheduleofWarrantLiabilityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_WarrantLiabilityScheduleofWarrantLiabilityDetailsTable"/> 
  <xs:element name="NumberOfWarrantsShareOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfWarrantsShareOutstanding"/>  
  <xs:element name="NumberOfWarrantsOutstandingValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfWarrantsOutstandingValue"/>  
  <xs:element name="ChangeInFairValue" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInFairValue"/>   
  <xs:element name="NumberOfWarrantsCommonSharesIssuableOnExercise" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfWarrantsCommonSharesIssuableOnExercise"/> 
  <xs:element name="NumberOfWarrantsCommonSharesIssuableOnExerciseAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfWarrantsCommonSharesIssuableOnExerciseAmount"/>   
  <xs:element name="WarrantLiabilityScheduleofFairValueofEachWarrantwasEstimatedUsingtheBlackScholesMertonModelDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_WarrantLiabilityScheduleofFairValueofEachWarrantwasEstimatedUsingtheBlackScholesMertonModelDetailsTable"/>    
  <xs:element name="IssuedOnExerciseOfShareUnits" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_IssuedOnExerciseOfShareUnits"/>     
  <xs:element name="IssuedOnExerciseOfShareUnit" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_IssuedOnExerciseOfShareUnit"/>   
  <xs:element name="ShareIssuanceCostsRelatedToNetOfTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ShareIssuanceCostsRelatedToNetOfTax"/>    
  <xs:element name="RevenuefromContractswithCustomersScheduleofRevenuefromContractswithCustomersDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_RevenuefromContractswithCustomersScheduleofRevenuefromContractswithCustomersDetailsTable"/>    
  <xs:element name="AmortizationOfDebtIssuanceCostsAndRedemptionPremium" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AmortizationOfDebtIssuanceCostsAndRedemptionPremium"/>     
  <xs:element name="AccretionOfDecommissioningObligations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccretionOfDecommissioningObligations"/>  
  <xs:element name="FinancingAndInterestExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_FinancingAndInterestExpenses"/>    
  <xs:element name="StockBasedCompensationScheduleofShareUnitsIssuedandOutstandingDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_StockBasedCompensationScheduleofShareUnitsIssuedandOutstandingDetailsTable"/> 
  <xs:element name="StockBasedCompensationScheduleofStockBasedCompensationExpenseDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_StockBasedCompensationScheduleofStockBasedCompensationExpenseDetailsTable"/>    
  <xs:element name="FinancialInstrumentsandRiskManagementScheduleofFairValueofFinancialInstrumentsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_FinancialInstrumentsandRiskManagementScheduleofFairValueofFinancialInstrumentsDetailsTable"/>   
  <xs:element name="RiskManagementContractsAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RiskManagementContractsAssets"/> 
  <xs:element name="RiskManagementContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RiskManagementContracts"/>    
  <xs:element name="RiskManagementContractAssetGross" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RiskManagementContractAssetGross"/> 
  <xs:element name="RiskManagementContractLiabilityOffsetAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RiskManagementContractLiabilityOffsetAmount"/>    
  <xs:element name="RealizedLossOnRiskManagementContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_RealizedLossOnRiskManagementContracts"/>   
  <xs:element name="UnrealizedGainlossOnRiskManagementContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnrealizedGainlossOnRiskManagementContracts"/>    
  <xs:element name="GainlossOnRiskManagementContract" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_GainlossOnRiskManagementContract"/>   
  <xs:element name="FinancialInstrumentsandRiskManagementScheduleofFinancialCommodityRiskManagementContractsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_FinancialInstrumentsandRiskManagementScheduleofFinancialCommodityRiskManagementContractsDetailsTable"/>   
  <xs:element name="FinancialInstrumentsandRiskManagementScheduleofFinancialCommodityRiskManagementContractsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FinancialInstrumentsandRiskManagementScheduleofFinancialCommodityRiskManagementContractsDetailsLineItems"/> 
  <xs:element name="CommodityRiskManagementContractVolume" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommodityRiskManagementContractVolume"/>    
  <xs:element name="CommodityRiskSwapPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommodityRiskSwapPrice"/>   
  <xs:element name="CommodityRiskPutPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommodityRiskPutPrice"/> 
  <xs:element name="CommodityRiskCallPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommodityRiskCallPrice"/>   
  <xs:element name="FinancialInstrumentsandRiskManagementScheduleofNetIncomeBeforeTaxBasedontheFinancialRiskManagementContractsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_FinancialInstrumentsandRiskManagementScheduleofNetIncomeBeforeTaxBasedontheFinancialRiskManagementContractsDetailsTable"/> 
  <xs:element name="FairValueOfCommodityRiskManagementContractsIncrease" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_FairValueOfCommodityRiskManagementContractsIncrease"/> 
  <xs:element name="FairValueOfCommodityRiskManagementContractsDecrease" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_FairValueOfCommodityRiskManagementContractsDecrease"/> 
  <xs:element name="JointInterestReceivables" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_JointInterestReceivables"/>     
  <xs:element name="AccruedJointInterestReceivables" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccruedJointInterestReceivables"/>    
  <xs:element name="FinancialInstrumentsandRiskManagementScheduleofContractualMaturitiesofitsFinancialLiabilitiesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_FinancialInstrumentsandRiskManagementScheduleofContractualMaturitiesofitsFinancialLiabilitiesDetailsTable"/>   
  <xs:element name="LeaseContractTermDomainDomain" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_LeaseContractTermDomainDomain"/>    
  <xs:element name="CommitmentsandContingenciesScheduleofCommitmentsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_CommitmentsandContingenciesScheduleofCommitmentsDetailsTable"/>   
  <xs:element name="OtherCommitments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_OtherCommitments"/>     
  <xs:element name="EstimatedFutureUnrecognizedCommitments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_EstimatedFutureUnrecognizedCommitments"/>    
  <xs:element name="AccruedInterestPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccruedInterestPayable"/>  
  <xs:element name="ChangeInPrepaidExpensesAndDeposits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInPrepaidExpensesAndDeposits"/>  
  <xs:element name="ChangeInIncomeTaxPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInIncomeTaxPayable"/>  
  <xs:element name="ChangeInWorkingCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ChangeInWorkingCapital"/>   
  <xs:element name="WithholdingTaxesOnShareUnits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_WithholdingTaxesOnShareUnits"/>     
  <xs:element name="UnrealizedForeignExchangeLossInAccountsPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnrealizedForeignExchangeLossInAccountsPayable"/> 
  <xs:element name="NoncashWorkingCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NoncashWorkingCapital"/>     
  <xs:element name="NonCashWorkingCapitalRelatedToOperatingActivities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NonCashWorkingCapitalRelatedToOperatingActivities"/> 
  <xs:element name="NonCashWorkingCapitalRelatedToInvestingActivitiesaccruedAdditionsPropertyPlantandEquipment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NonCashWorkingCapitalRelatedToInvestingActivitiesaccruedAdditionsPropertyPlantandEquipment"/>   
  <xs:element name="NetChangeInNoncashWorkingCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_NetChangeInNoncashWorkingCapital"/>   
  <xs:element name="CorporateInformationDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_CorporateInformationDetailsTable"/>  
  <xs:element name="OutstandingCommonSharesPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_OutstandingCommonSharesPercentage"/>   
  <xs:element name="CommonSharesLimitedPartnershipOwnershipPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommonSharesLimitedPartnershipOwnershipPercentage"/>     
  <xs:element name="MaterialAccountingPoliciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_MaterialAccountingPoliciesDetailsTable"/>    
  <xs:element name="WorkingInterestPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WorkingInterestPercentage"/>   
  <xs:element name="NumberOfReportableOperatingSegment" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfReportableOperatingSegment"/>   
  <xs:element name="StockBasedCompensation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_StockBasedCompensation"/>  
  <xs:element name="ShareBasedCompensations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_ShareBasedCompensations"/>    
  <xs:element name="PropertyPlantandEquipmentPPEDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_PropertyPlantandEquipmentPPEDetailsTable"/>   
  <xs:element name="DecommissioningObligations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningObligations"/>     
  <xs:element name="IncomeTaxLossesCarriedForward" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_IncomeTaxLossesCarriedForward"/> 
  <xs:element name="LongTermDebtDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_LongTermDebtDetailsTable"/> 
  <xs:element name="OperatingFacilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_OperatingFacilities"/> 
  <xs:element name="SyndicatedFacility" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_SyndicatedFacility"/>     
  <xs:element name="CreditFacility" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CreditFacility"/>  
  <xs:element name="MaturityDateOfSeniorCreditFacility" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_MaturityDateOfSeniorCreditFacility"/>     
  <xs:element name="SecuredNotesIssued" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_SecuredNotesIssued"/>    
  <xs:element name="WarrantsFixedInterestRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WarrantsFixedInterestRate"/>   
  <xs:element name="MaturityDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_MaturityDate"/> 
  <xs:element name="PercentageOfVoluntarilyRedeemedPrincipalAmount" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PercentageOfVoluntarilyRedeemedPrincipalAmount"/>     
  <xs:element name="MinimumHedgingRequirementsPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_MinimumHedgingRequirementsPercentage"/>     
  <xs:element name="AnnualCapitalExpenditureLimitation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_AnnualCapitalExpenditureLimitation"/>  
  <xs:element name="PrincipalAmountPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_PrincipalAmountPercentage"/>  
  <xs:element name="LimitCapitalExpenditures" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LimitCapitalExpenditures"/>  
  <xs:element name="OutstandingPrincipalPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_OutstandingPrincipalPercentage"/>   
  <xs:element name="UnsecuredCreditFacility" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnsecuredCreditFacility"/>     
  <xs:element name="LettersOfCreditOutstanding" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_LettersOfCreditOutstanding"/> 
  <xs:element name="CapitalExpendituresPrincipalOutstanding" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CapitalExpendituresPrincipalOutstanding"/> 
  <xs:element name="DecommissioningLiabilitiesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_DecommissioningLiabilitiesDetailsTable"/>    
  <xs:element name="DecommissioningObligationsValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningObligationsValue"/>     
  <xs:element name="CreditAdjustedDiscountRatePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_CreditAdjustedDiscountRatePercentage"/>    
  <xs:element name="WarrantsIssued" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WarrantsIssued"/>  
  <xs:element name="NumberOfCommonShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfCommonShares"/>   
  <xs:element name="ClassOfWarrantsOrRightsExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_ClassOfWarrantsOrRightsExercisePrice"/>     
  <xs:element name="CommonSharePricePerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommonSharePricePerShare"/>  
  <xs:element name="WarrantsAndRightOutstandingTerm" type="xbrli:dateItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_WarrantsAndRightOutstandingTerm"/>   
  <xs:element name="ShareCapitalandPerShareAmountsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_ShareCapitalandPerShareAmountsDetailsTable"/>  
  <xs:element name="StockBasedCompensationDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_StockBasedCompensationDetailsTable"/> 
  <xs:element name="NumberOfOutstandingShareUnitsWereExercisable" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfOutstandingShareUnitsWereExercisable"/> 
  <xs:element name="NumberOfPerformanceWarrantsOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfPerformanceWarrantsOutstanding"/>    
  <xs:element name="TradeReceivablesPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TradeReceivablesPercentage"/>     
  <xs:element name="PercentageOfInterestReceivables" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PercentageOfInterestReceivables"/>     
  <xs:element name="RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gfr_RelatedPartyTransactionsDetailsTable"/>     
  <xs:element name="NumberOfCommonStockReceivedOnExerciseOfWarrants" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfCommonStockReceivedOnExerciseOfWarrants"/>  
  <xs:element name="NumberOfSharesUnits" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfSharesUnits"/>  
  <xs:element name="CurrentLegalFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="gfr_CurrentLegalFees"/>     
  <xs:element name="NumberOfStockIssuedToRelatedParty" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NumberOfStockIssuedToRelatedParty"/>     
  <xs:element name="FairMarketValueOfConsultingService" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="gfr_FairMarketValueOfConsultingService"/>  
  <xs:element name="LeaseContractTermAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem" id="gfr_LeaseContractTermAxis"/>     
  <xs:element name="AECOSwapMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_AECOSwapMember"/>    
  <xs:element name="AccountsPayableAndAccruedLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccountsPayableAndAccruedLiabilityMember"/> 
  <xs:element name="AccountsReceivablesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccountsReceivablesMember"/> 
  <xs:element name="AthabascaRegionNorthernAlbertaMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_AthabascaRegionNorthernAlbertaMember"/>   
  <xs:element name="BlackScholesMertonValuationModelMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_BlackScholesMertonValuationModelMember"/>  
  <xs:element name="CanadianDollarAndVolumesInBarrelsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CanadianDollarAndVolumesInBarrelsMember"/>    
  <xs:element name="CanadianDollarAndVolumesInGigajoulesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CanadianDollarAndVolumesInGigajoulesMember"/>     
  <xs:element name="CanadianExplorationExpendituresMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CanadianExplorationExpendituresMember"/>     
  <xs:element name="CanadianOilAndGasPropertyExpendituresMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CanadianOilAndGasPropertyExpendituresMember"/>  
  <xs:element name="CarryingValueMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CarryingValueMember"/>    
  <xs:element name="CashAndCashEquivalentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CashAndCashEquivalentMember"/>     
  <xs:element name="ContributedSurplusMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ContributedSurplusMember"/>    
  <xs:element name="CorporateAssetsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CorporateAssetsMember"/>   
  <xs:element name="DSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DSUsMember"/> 
  <xs:element name="DeferredShareUnitsDSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DeferredShareUnitsDSUsMember"/>  
  <xs:element name="DevelopedAndProducingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DevelopedAndProducingMember"/>     
  <xs:element name="DilutedBitumenSalesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DilutedBitumenSalesMember"/> 
  <xs:element name="FederalIncomeTaxLossesCarriedForwardMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FederalIncomeTaxLossesCarriedForwardMember"/>     
  <xs:element name="FirstQuaterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FirstQuaterMember"/>     
  <xs:element name="FourthQuarterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FourthQuarterMember"/>    
  <xs:element name="HangingstonMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_HangingstonMember"/>     
  <xs:element name="LetterOfCreditFacilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_LetterOfCreditFacilityMember"/>  
  <xs:element name="LongtermDebtMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_LongtermDebtMember"/>  
  <xs:element name="M3BrigadeSponsorIIILPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_M3BrigadeSponsorIIILPMember"/>     
  <xs:element name="NonDilutedBitumenSalesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NonDilutedBitumenSalesMember"/>  
  <xs:element name="OilSalesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_OilSalesMember"/>    
  <xs:element name="PSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PSUsMember"/> 
  <xs:element name="PWsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PWsMember"/>    
  <xs:element name="PastTwoThousandThirtyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PastTwoThousandThirtyMember"/>     
  <xs:element name="PerformanceShareUnitsPSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PerformanceShareUnitsPSUsMember"/>   
  <xs:element name="PerformanceWarrantsPWsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_PerformanceWarrantsPWsMember"/>  
  <xs:element name="RSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RSUsMember"/> 
  <xs:element name="RestrictedShareUnitsRSUsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RestrictedShareUnitsRSUsMember"/> 
  <xs:element name="RightOfUseAssetsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RightOfUseAssetsMember"/>     
  <xs:element name="RightsOfferingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RightsOfferingMember"/> 
  <xs:element name="RiskManagementContractsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RiskManagementContractsMember"/>    
  <xs:element name="RoyaltiesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_RoyaltiesMember"/> 
  <xs:element name="SecondQuarterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_SecondQuarterMember"/>    
  <xs:element name="TenPercentageChangeInCommodityPricesDecreaseMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TenPercentageChangeInCommodityPricesDecreaseMember"/> 
  <xs:element name="TenPercentageChangeInCommodityPricesIncreaseMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TenPercentageChangeInCommodityPricesIncreaseMember"/> 
  <xs:element name="ThirdQuarterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ThirdQuarterMember"/>  
  <xs:element name="TwoThousandThirtyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandThirtyMember"/>  
  <xs:element name="TwoThousandTwentyEightMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandTwentyEightMember"/>  
  <xs:element name="TwoThousandTwentyEightNoteMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandTwentyEightNoteMember"/>     
  <xs:element name="TwoThousandTwentyNineMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandTwentyNineMember"/>     
  <xs:element name="TwoThousandTwentySevenMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandTwentySevenMember"/>  
  <xs:element name="TwoThousandTwentySixMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_TwoThousandTwentySixMember"/>   
  <xs:element name="UndepreciatedCapitalCostMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_UndepreciatedCapitalCostMember"/> 
  <xs:element name="UnitedStatesDollarAndVolumesInBarrelsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_UnitedStatesDollarAndVolumesInBarrelsMember"/>  
  <xs:element name="WCSDifferentialSwapMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WCSDifferentialSwapMember"/> 
  <xs:element name="WTICostlessCollarMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WTICostlessCollarMember"/>  
  <xs:element name="WTIFixedPriceSwapMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WTIFixedPriceSwapMember"/>  
  <xs:element name="WarrantLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WarrantLiabilityMember"/>     
  <xs:element name="WaterousEnergyFundMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WaterousEnergyFundMember"/>    
  <xs:element name="AccountsPayableAndAccruedLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_AccountsPayableAndAccruedLiabilitiesAbstract"/> 
  <xs:element name="CapitalManagementAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CapitalManagementAbstract"/>   
  <xs:element name="CommitmentsAndContingenciesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommitmentsAndContingenciesAbstract"/>   
  <xs:element name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_CommitmentsAndContingenciesLineItems"/>     
  <xs:element name="ConsolidatedBalanceSheetToTheConsolidatedStatementOfCashFlowsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ConsolidatedBalanceSheetToTheConsolidatedStatementOfCashFlowsAbstract"/> 
  <xs:element name="DecommissioningLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningLiabilitiesAbstract"/> 
  <xs:element name="DecommissioningLiabilitiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DecommissioningLiabilitiesLineItems"/>   
  <xs:element name="FinancingAndInterestAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_FinancingAndInterestAbstract"/>    
  <xs:element name="NetIncomeBeforeTaxBasedOnTheFinancialRiskManagementContractsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_NetIncomeBeforeTaxBasedOnTheFinancialRiskManagementContractsLineItems"/> 
  <xs:element name="OtherItemsImpactingChangesInNonCashWorkingCapitalAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_OtherItemsImpactingChangesInNonCashWorkingCapitalAbstract"/>  
  <xs:element name="ReconciliationOfTheDecommissioningLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ReconciliationOfTheDecommissioningLiabilitiesAbstract"/>    
  <xs:element name="ScheduleOfAccountsPayableAndAccruedLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ScheduleOfAccountsPayableAndAccruedLiabilitiesAbstract"/> 
  <xs:element name="ScheduleOfFinancingAndInterestAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ScheduleOfFinancingAndInterestAbstract"/>    
  <xs:element name="ScheduleOfGainLossOnRiskManagementContractsabstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_ScheduleOfGainLossOnRiskManagementContractsabstract"/>     
  <xs:element name="SupplementalCasFFlowInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_SupplementalCasFFlowInformationAbstract"/> 
  <xs:element name="WarrantLiabilityLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_WarrantLiabilityLineItems"/>   
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  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gfr_DocumentAndEntityInformationAbstract"/>     
</xs:schema>
