The 2005 FIA GT Magny-Cours Supercar 500 was the second race for the 2005 FIA GT Championship season.
It took place on 1 May 2005 at the Circuit de Nevers Magny-Cours.
It was also the second round of the 2005 British GT Championship, counting for the GT2 class only.
Cars failing to complete 70% of winner's distance marked as Not Classified (NC).
Entries in italic scored points for the British GT Championship.