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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_7a49579f-c076-489b-a16e-bff1d4e2a9ed_totalLabel_fr" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) des activités avant variations du fonds de roulement</link:label>
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    <link:label id="lab_grbt_AugmentationDiminutionDesDettesFournisseursDImmobilisations_documentation_fr" xlink:label="lab_grbt_AugmentationDiminutionDesDettesFournisseursDImmobilisations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="fr">Augmentation (Diminution) Des Dettes Fournisseurs D Immobilisations</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_grbt_AugmentationDiminutionParLeBiaisDAutresMouvementsCapitauxPropres" xlink:to="lab_grbt_AugmentationDiminutionParLeBiaisDAutresMouvementsCapitauxPropres" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_7e2d8b14-a48e-4a18-80a1-7928d6646bb1_totalLabel_fr" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) des activités opérationnelles</link:label>
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    <link:label id="lab_grbt_CoutDeLaDetteFinanciereBrute_label_fr" xlink:label="lab_grbt_CoutDeLaDetteFinanciereBrute" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="fr">Cout De La Dette Financiere Brute</link:label>
    <link:label id="lab_grbt_CoutDeLaDetteFinanciereBrute_documentation_fr" xlink:label="lab_grbt_CoutDeLaDetteFinanciereBrute" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="fr">Cout De La Dette Financiere Brute</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_grbt_CoutDeLaDetteFinanciereBrute" xlink:href="grbt-2023-12-31.xsd#grbt_CoutDeLaDetteFinanciereBrute"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_grbt_CoutDeLaDetteFinanciereBrute" xlink:to="lab_grbt_CoutDeLaDetteFinanciereBrute" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_3cf01077-6662-4577-abff-cd77ebed7e8e_totalLabel_fr" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) d’activités de financement</link:label>
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    <link:label id="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition_54a9a24c-1022-4a6b-9b36-508d17095e30_periodStartLabel_fr" xlink:label="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="fr">Trésorerie et équivalents de trésorerie si différents de l’état de la situation financière</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:to="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_ad7982cb-6b15-4294-b2e1-3f76321b14aa_totalLabel_fr" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) d’activités d’investissement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_grbt_Investissements_c4a4ba8d-6730-4112-9c81-dfddfe01580d_totalLabel_fr" xlink:label="lab_grbt_Investissements" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Investissements</link:label>
    <link:label id="lab_grbt_Investissements_label_fr" xlink:label="lab_grbt_Investissements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="fr">Investissements</link:label>
    <link:label id="lab_grbt_Investissements_documentation_fr" xlink:label="lab_grbt_Investissements" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="fr">Investissements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_grbt_Investissements" xlink:href="grbt-2023-12-31.xsd#grbt_Investissements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_grbt_Investissements" xlink:to="lab_grbt_Investissements" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_489a023a-1b84-4935-9925-0498f505a6fe_totalLabel_fr" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Augmentation (diminution) de la trésorerie et des équivalents de trésorerie après effet des variations des taux de change</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents"/>
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    <link:label id="lab_grbt_Cessions_077759d4-7d4e-4d24-afab-e71777c752c3_totalLabel_fr" xlink:label="lab_grbt_Cessions" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="fr">Cessions</link:label>
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    <link:label id="lab_grbt_AjustementsPourCoutDeLaDetteFinanciereNette_label_fr" xlink:label="lab_grbt_AjustementsPourCoutDeLaDetteFinanciereNette" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="fr">Ajustements Pour Cout De La Dette Financiere Nette</link:label>
    <link:label id="lab_grbt_AjustementsPourCoutDeLaDetteFinanciereNette_documentation_fr" xlink:label="lab_grbt_AjustementsPourCoutDeLaDetteFinanciereNette" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="fr">Ajustements Pour Cout De La Dette Financiere Nette</link:label>
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    <link:label id="lab_grbt_CapaciteDAutofinancementApresCoutDeLEndettementFinancierNetEtImpot_documentation_fr" xlink:label="lab_grbt_CapaciteDAutofinancementApresCoutDeLEndettementFinancierNetEtImpot" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="fr">Capacite D Autofinancement Apres Cout De L Endettement Financier Net Et Impot</link:label>
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