His number 4 jersey was retired by ASVEL, and the club's logo was also designed in his honor.

Gilles played for the French clubs Chorale Roanne (1962–1965) and ASVEL Basket (1965–1986).

He also won 3 French League Player of the Year awards.

In France's top-tier level competition, Gilles scored a total of 18,502 career points.

Gilles played in 160 games with the senior men's French national basketball team.