Gauthier was drafted 28th overall in the fourth round of the 2016 CFL Draft by the Blue Bombers and signed with the team on May 20, 2016.[2] Following training camp, he made the team's active roster and played in his first professional football game on June 24, 2016, against the Montreal Alouettes where he recorded one special teams tackle. Over the course of his career, he has primarily been a special teams player for the Blue Bombers. During the 2019 West Division Final against the Saskatchewan Roughriders, with the Blue Bombers leading 20–13 in the fourth quarter, Gauthier made a shoestring tackle to save a touchdown during a trick punt return. Winnipeg closed out the game by the same score and the Blue Bombers advanced to the 107th Grey Cup.[3] In the Grey Cup game that year, Gauthier recorded one special teams tackle as the Blue Bombers ended a 29-year championship drought in the victory over the Hamilton Tiger-Cats.[4]
On January 8, 2021, Gauthier signed a one-year contract extension to remain with the Blue Bombers.[5]
