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  <xs:element id="gff_CommercialConstructionMember" abstract="true" name="CommercialConstructionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_ResidentialNewConstructionMember" abstract="true" name="ResidentialNewConstructionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDueToNewPlans" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDueToNewPlans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gff_CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gff_CashPaidForLeaseLiability" abstract="false" name="CashPaidForLeaseLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gff_AssetsAndLiabilitiesLesseeOperatingLeaseAbstract" abstract="true" name="AssetsAndLiabilitiesLesseeOperatingLeaseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gff_FinanceLeaseAssetsAndLiabilitiesAbstract" abstract="true" name="FinanceLeaseAssetsAndLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gff_FinanceLeaseAndOperatingLeaseWeightedAverageRemainingLeaseTermAbstract" abstract="true" name="FinanceLeaseAndOperatingLeaseWeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gff_FinanceLeaseAndOperatingLeaseWeightedAverageDiscountRateAbstract" abstract="true" name="FinanceLeaseAndOperatingLeaseWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gff_AMESU.S.CanadaAustraliaAndU.KMember" abstract="true" name="AMESU.S.CanadaAustraliaAndU.KMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_AustralianDollarContractsMember" abstract="true" name="AustralianDollarContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_O2026Q1DividendsMember" abstract="true" name="O2026Q1DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_O2026Q2DividendsMember" abstract="true" name="O2026Q2DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_O2026Q3DividendsMember" abstract="true" name="O2026Q3DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_O2026Q4DividendsMember" abstract="true" name="O2026Q4DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_GlobalSourcingStrategyExpansionMember" abstract="true" name="GlobalSourcingStrategyExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_IntangibleAssetImpairmentsMember" abstract="true" name="IntangibleAssetImpairmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_InventoryWriteDownMember" abstract="true" name="InventoryWriteDownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_FixedAssetWriteDownChargesMember" abstract="true" name="FixedAssetWriteDownChargesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gff_EquityMethodInvestmentRealizedGainLossOnDisposalNetOfTax" abstract="false" name="EquityMethodInvestmentRealizedGainLossOnDisposalNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gff_NumberOfQuarterlyDividends" abstract="false" name="NumberOfQuarterlyDividends" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gff_RepaymentsOfThePrincipalOfLongTermDebt" abstract="false" name="RepaymentsOfThePrincipalOfLongTermDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
