| Transactions

2020: Signed a two-season contract with the Montreal Alouettes on March 19.
2019: Signed with the Ottawa REDBLACKS.
2018: Resigned with the Montreal Alouettes.
2016: Drafted in the first round, 2nd overall, by the Montreal Alouettes.

| Career

2022: Participated in 16 games for the Montreal Alouettes, starting 14 of them.
2021: Participated in nine games with the Montreal Alouettes.
2019: Played his first season with the Ottawa REDBLACKS and participated in nine games, including eight as a starter.
2018: Participated in 11 games with the Montreal Alouettes. Gagnon was part of an offensive line that allowed running back Tyrell Sutton to gain 843 yards on 152 carries and five touchdowns.
2017: Participated in seven games for the Montreal Alouettes. Gagnon and his teammates created gaps that allowed the Alouettes to finish third in the CFL with 1,718 rushing yards, averaging 95.4 rushing yards per game.
2016: In his first season, Gagnon participated in all 18 games of the Alouettes.

| College

Gagnon played four seasons with the Université Laval Rouge et Or. He played in 34 games and won two consecutive Vanier Cups (2012 and 2013). In addition to team awards, Gagnon received individual honors. He was named to the RSEQ offensive All-Star team in 2014 and 2015. He was also named to the second team of Canadian All-Stars (U SPORTS) in 2014 and 2015.

| Medias