Grégory Gendron started sailing as a child on the family boat, then moved through competitive dinghy classes before taking part in the Tour de France à la Voile, where he led the Nantes – Saint-Nazaire youth crew.
He raced with Antoine Koch on an ORMA-circuit trimaran (Sopra) and finished 5th in the 2007 Transat Jacques Vabre. He turned professional as a Figaro sailor, often facing Romain Attanasio, and built extensive multihull experience with teams such as Gitana and Spindrift racing.
In 2023 he was chosen to sail alongside Romain Attanasio on the IMOCA Fortinet – Best Western in the Rolex Fastnet Race, finishing 10th after a little over two days and nine hours.