At the 2009 World Junior Short Track Championships were held in his hometown of Sherbrooke. Gélinas-Beaulieu was named Quebec"s male national athlete of the year at the 37th annual Sports Québec Gala on December 23, 2009. He also finished third overall in the competition.
Next he attended the 2011 Canada Winter Games in Halifax, Nova Scotia.
His victories came as part of a comeback as much of the previous season had been lost to him due to being ill from mononucleosis.
Antoine won a silver medal in the 1000 m and a bronze in the 1500 m race, this aided his 4th place finish overall as a 16-year-old. At the following junior short track championships in 2010 in Taipei he won 5 silver medals in the 500m, 1000m, 1500m super final, 3000m relay, and the overall silver medal. Gélinas-Beaulieu also received two bronze medals at the 2010 World Junior Speed Skating Championships in long track. He received the bronze medals in the 1500 m and the 5000 m. There Gélinas-Beaulieu won three gold medals in long track speed skating for Quebec in the 1,500 m, 3,000 m, 5,000 m.
He is currently a member of the national junior short track team for Canada.
