[1] He was born on March 11, 1877, in Montreal, the son of Édouard Gauthier and Célina Richard.
[1] He ran as a Labour candidate in the district of Montréal–Sainte-Marie in a by-election held on December 22, 1921, and won.
Gauthier was defeated by Conservative candidate Camillien Houde in the 1923 provincial election.
Gauthier defeated Houde and was re-elected as a Liberal in 1927 provincial election.
[1] He died on June 27, 1934, in Montreal and was buried in the Notre Dame des Neiges Cemetery.