The 2025 International GT Open will be the twentieth season of the International GT Open, the grand tourer-style sports car racing series founded in 2006 by the Spanish GT Sport Organización. It will begin on 26 April at the Algarve International Circuit and will end at the Autodromo Nazionale di Monza on 19 October after eight rounds.
The calendar was announced on 11 July 2024.[1]
| Round | Circuit | Date | Support bill | Map of circuit locations | |
|---|---|---|---|---|---|
| 1 | R1 |  Algarve International Circuit, Portimão | 26–27 April | Euroformula Open Championship GT Cup Open Europe | |
| R2 | |||||
| 2 |  Circuit de Spa-Francorchamps, Stavelot | 17–18 May | Euroformula Open Championship GT Cup Open Europe | ||
| 3 | R1 | Hockenheimring, Hockenheim | 7–8 June | Euroformula Open Championship GT Cup Open Europe | |
| R2 | |||||
| 4 | R1 |  Hungaroring, Mogyoród | 5–6 July | Euroformula Open Championship | |
| R2 | |||||
| 5 | R1 |  Circuit Paul Ricard, Le Castellet | 19–20 July | Euroformula Open Championship GT Cup Open Europe | |
| R2 | |||||
| 6 | R1 |  Red Bull Ring, Spielberg | 6–7 September | Euroformula Open Championship | |
| R2 | |||||
| 7 | R1 |  Circuit de Barcelona-Catalunya, Montmeló | 20–21 September | Euroformula Open Championship GT Cup Open Europe | |
| R2 | |||||
| 8 |  Autodromo Nazionale di Monza, Monza | 18–19 October | Euroformula Open Championship GT Cup Open Europe | ||
|
|