| No. | Team | Nat. | Vettura | Cat. |
| GT1 | ||||
| 01 | Vitaphone Racing Team | GER | Maserati MC12 | GT1 |
| 02 | Vitaphone Racing Team | GER | Maserati MC12 | GT1 |
| 04 | GLPK-Carsport | BEL | Corvette C6R | GT1 |
| 05 | Phoenix Racing | GER | Aston Martin DBR9 | GT1 |
| 07 | Cirtek Motorsport | GBR | Aston Martin DBR9 | GT1 |
| 09 | Zakspeed Racing | GER | Saleen S7R | GT1 |
| 11 | Balfe Motorsport | GBR | Saleen S7R | GT1 |
| 13 | B-Racing RS-Line Team | GER | Lamborghini Murcielago | GT1 |
| 14 | Reiter Engineering | GER | Lamborghini Murcielago | GT1 |
| 15 | JMB Racing | MON | Maserati MC12 | GT1 |
| 19 | Red Racing | FRA | Lister Storm | GT1 |
| 23 | Aston Martin Racing BMS | ITA | Aston Martin DBR9 | GT1 |
| 24 | Aston Martin Racing BMS | ITA | Aston Martin DBR9 | GT1 |
| 33 | Race Alliance Motorsport | AUT | Aston Martin DBR9 | GT1 |
| 44 | Race Alliance Motorsport | AUT | Aston Martin DBR9 | GT1 |
| GT2 | ||||
| 52 | Renauer Motorsport Team | AUT | Porsche 996 GT3 RSR | GT2 |
| 53 | Renauer Motorsport Team | AUT | Porsche 996 GT3 RSR | GT2 |
| 54 | Vonka Racing | CZE | Porsche 996 GT3 RSR | GT2 |
| 55 | JMB Racing | MON | Ferrari 430 GT2 | GT2 |
| 56 | JMB Racing | MON | Ferrari 430 GT2 | GT2 |
| 57 | Team LNT | GBR | Panoz Esperante | GT2 |
| 58 | AF Corse | ITA | Ferrari 430 GT2 | GT2 |
| 59 | AF Corse | ITA | Ferrari 430 GT2 | GT2 |
| 60 | RJN Motorsport | GBR | Nissan 350z | GT2 |
| 62 | Scuderia Ecosse | GBR | Ferrari 430 GT2 | GT2 |
| 63 | Scuderia Ecosse | GBR | Ferrari 430 GT2 | GT2 |
| 66 | Team Felbermayr-Proton | GER | Porsche 996 GT3 RSR | GT2 |
| 69 | Team Felbermayr-Proton | GER | Porsche 996 GT3 RSR | GT2 |
| 70 | GPC Sport | ITA | Ferrari 430 GT2 | GT2 |
| 71 | RSV Motorsport | ESP | Ferrari 430 GT2 | GT2 |
| 74 | Ebimotors | ITA | Porsche 996 GT3 RSR | GT2 |
| 75 | Ebimotors | ITA | Porsche 996 GT3 RSR | GT2 |
| 77 | Autoracing Club Bratislava | SVK | Porsche 996 GT3 RSR | GT2 |
| 99 | Race Alliance | AUT | Porsche 996 GT3 RSR | GT2 |
| G2 | ||||
| 101 | Belgian Racing | BEL | Gillet Vertigo | G2 |
| 124 | Breckland Racing | GBR | Mosler MT900 | G2 |