In 2018, he got to play in his first World Junior Curling Championships as alternate for his cousin, Tyler Tardi's rink, where the team won a gold medal.

His rink of Jordan Peters, Brayden Payette and Zack Bilawka lost the final of the 2020 Manitoba Junior Provincials.

[5] Gauthier found success in men's play, skipping a rink out of BC for the 2022–23 curling season.

[6] In their first season together, the team won the 2023 BC Men's Curling Championship and represented British Columbia at the 2023 Tim Hortons Brier.

Koe qualified for the 2024 Montana's Brier as one of the wild card teams based on their CTRS ranking.