2005-06: Gauthier capped an excellent career at the University of Denver with 39 points (15 goals, 24 assists) playing in 38 games in his final year. He finished tied for second on the team in power play goals with nine. Gauthier, along with defenseman Matt Carle (SJ) served as captains of the Pioneers team that finished with a 21-15-3 record this season. On team that lost a lot of veteran leadership in the summer of 2005, Gauthier was a stabilizing presence up front for the University of Denver. At season’s end, Gauthier took home three team awards, being named the recipient of the Pioneers’ Players Bench “Star of the Year”, the Dr. Ralph Verploeg Award as the team’s Most Inspirational Player and the Bob Martin Award for Community Service.
Gauthier finishes his four-year career with the University of Denver ranked 16th all time in school history in scoring with 155 points (67 goals, 88 assists) playing in 164 games and helping to guide the Pioneers to back-to-back national championships in 2004 and 2005. His 31 career power play goals and 164 career games played both rank second all time.
2006-07: Scored 42 points in 69 games for the Monarchs, good for third on the team in scoring. Gauthier was called up to Los Angeles towards the middle of the season as the Kings started looking for consistency from any source. In his first 5 career HL games, Gauthier registered onyl two penalty minutes in very limited playing time.
2007-08: Combined on a line with Ted Purcell and Matt Moulson in Manchester, Gauthier continued to push his scoring totals forward, this time with 60 points in 61 games. His offensive play was enough to force a call-up with Los Angeles early in the season. He would only appear in three games with the Kings, but he has placed his name in the group of Manchester forwards that can compete for playing time in Los Angeles in the coming years.