He also drove in the 24 Hours of Nürburgring and with teammates Emanuele Pirro and Roberto Ravaglia won the race in their Team Bigazzi BMW M3.

In 1990 he dropped to 9th in points for the same team but won the Spa 24 Hours with teammates Johnny Cecotto and Markus Oestreich.

In 1992 Giroix drove in the French Supertouring Championship in a Garage du BAC BMW M3 and finished 4th in points.

In 1997 Giroix's team became the factory-backed outfit for the Lotus Elise GT1 in the FIA GT Championship but the season was not successful.

As of 2010 he remains an active driver, having made four starts in a Lamborghini Gallardo in the French GT Championship.