 After graduation, he was signed as a free agent to a two-year contract by the Kings in 2006.He has played for the Kings organization, mostly for the Manchester Monarchs of the American Hockey League (AHL), including being selected as the team man of the year in his first season, but he periodically played in the NHL; he appeared in 5 games with the Kings in 2006–07 and 3 games in 2007–08.After an injury stricken 2010–11 season split between the Victoria Salmon Kings of the ECHL and the Syracuse Crunch of the AHL, Gauthier left North America to sign with Augsburger Panther of the Deutsche Eishockey Liga (DEL) on a one-year contract on July 15, 2011.