At the 2016 Pan American Junior Judo Championships in Buenos Aires, Argentina, Gauthier-Drapeau won the bronze medal in the 73 kg category.

[1] After a few years of inactivity due to an injury and the COVID-19 pandemic,[3] Gauthier-Drapeau returned to competition at the 2021 Judo Grand Slam Paris in the 81 kg category, where he lost in overtime to the then number two world ranked Matthias Casse of Belgium.

[5][6] Gauthier-Drapeau started the 2022 season with a fifth place finish at the Paris Grand Slam, losing the bronze medal match in overtime.

[7][8] In April 2022, at the combined 2022 Pan American-Oceania Judo Championships in Lima, Peru, Gauthier-Drapeau won the bronze medal in the 81 kg category.

[11] Gauthier-Drapeau was named to his first national senior multi-sport event team for the 2022 Commonwealth Games in June 2022.