He was selected in the sixth round of the 2003 NHL Entry Draft, 182nd overall, by the Islanders. Gervais was named captain of the Acadie-Bathurst Titan of the QMJHL as an 18-year-old even though there were many veteran players. In his 19 year old season he hurt his knee at the December tryout camp for team Canada's under 20 team. He missed the rest of the season.
He has a brother, Maxime, who will play for the Cape Breton Screaming Eagles in the QMJHL. He was selected as the Nassau County Athlete of the Year Award in 2009.