Gilles/Poirier placed fourth at both of their Grand Prix assignments, the 2017 Skate America and 2017 Rostelecom Cup. Following this, the two opted to change their free dance program mid-season, discarding an initial film noir-themed routine for a James Bond program. Poirier explained that they felt the need for "a more accessible vehicle going into the Olympics and one that (fans) can more readily identify with." Their scores dramatically improved with the new program, and they earned the silver medal at the 2018 Canadian championships, on the way to qualifying for the 2018 Winter Olympics in Pyeongchang, South Korea. Gilles described this as "a breath of fresh air because we've worked our entire lives for that Olympic moment, qualifying for the games has always been my dream." The duo placed eighth at their first Olympics, and ended the season with a sixth-place finish at the 2018 World Championships.