Whakaotihia te rerenga e whai ake nei: I te Pipiri 28, 2013, i karangatia a Gauthier ki te puni whanaketanga raumati a te Rōpū Rangatahi a Kanata. Whai muri i tana whakauru, he mema ia o te kapa Kanata i toa i te mētara koura i te
Ko te 2013 IIHF World U18 Championships. I te tau e whai ake nei, i karangatia ano ia ki te puni whanaketanga raumati a te Rōpū Rangatahi o Canada i mua i te 2014 World Junior Ice Hockey Championships. I muri i te hanga i te rārangi whakamutunga, ngaro Team Canada i roto i te hawhe-mutunga ki Finland, a kihai i taea ki te mētara ki Russia. I a ia e takaro ana i nga keemu e ono, i tuhia e Gauthier tetahi awhina ka mutu me te -2 Plus<unk>minus.