The 2004 FIA GT Championship season was the 8th season of the FIA GT Championship. It was a series contested by Grand Touring style cars broken into two classes based on power and manufacturer involvement, called GT and N-GT. It began on 28 March 2004 and ended 14 November 2004 after 11 races.
The GT Drivers Championship was won jointly by Luca Cappellari and Fabrizio Gollin who shared a Ferrari 550 Maranello entered by BMS Scuderia Italia.
The N-GT Drivers Championship was won jointly by Sascha Maassen and Lucas Luhr who shared a Porsche 996 GT3 RSR entered by Freisinger Motorsport.
Points were awarded separately in both GT and N-GT to the top 8 class finishers in the order of 10–8–6–5–4–3–2–1. At the Spa 24 Hours only, half points were also granted to the leading eight cars at the 12-hour mark. Both cars scored points towards the championship.
† – AF Corse was originally not allowed to score points due to their Maserati MC12 not being legally homologated. This was changed for Round 11 in Zhuhai, legalizing the MC12.