His most notable and best result was the gold medal in the slalom at the 1976 Winter Olympics: he preceded the silver medalist Thöni, in the most successful race ever for Italy at the Winter Olympics. According to Gros, that race was also significant in which he defeated the then almost unbeatable Ingemar Stenmark of Sweden, to which Gros had been second for six times in that 1976 World Cup season. Gros won another world championship medal in 1978, taking silver in slalom. Stenmark's dominance was the major factor in Gros' limited success in the late 1970s.