She won a gold medal in the K-1 200 m LTA event at the 2010 ICF Canoe Sprint World Championships in Poznań.

[citation needed] Competing at the IPC Ice Sledge Hockey Women's International Cup from November 7–9, 2014 in Brampton, Ontario, Canada,[2] Gauthier emerged with a silver medal.

At the 2015 ICF Canoe Sprint World Championships in Milan, Italy, Gauthier finished in sixth place.

[3] In December 2022, Gauthier testified that a Veterans Affairs Canada employee offered her medical assistance in dying (MAiD) as an option when she was fighting for installing a wheelchair lift or ramp at her house.

[4] This has led to a national controversy, with Prime minister Justin Trudeau called the report "absolutely unacceptable".