Kammala wannan jumla: A ranar 28 ga Yuni, 2013, an gayyaci Gauthier zuwa sansanin ci gaban bazara na Ƙungiyar Ƙwararrun Ƙwararrun Ƙasar Kanada. Bayan yin jerin sunayen, ya kasance mamba ne na tawagar Kanada da ta lashe lambar zinare a gasar
2013 IIHF Gasar Kofin Duniya ta U18. A shekara mai zuwa, an sake gayyatar shi zuwa sansanin ci gaban bazara na Ƙungiyar Ƙungiyar Ƙungiyar Ƙungiyar Ƙasar Kanada kafin gasar zakarun duniya ta Junior Ice Hockey ta 2014. Bayan yin jerin sunayen karshe, Team Canada ta yi rashin nasara a wasan kusa da na karshe zuwa Finland kuma ta kasa samun lambar yabo a kan Rasha. Yayin wasa a wasanni shida, Gauthier ya yi rikodin taimako guda daya kuma ya ƙare da -2 Plus<unk>minus.