2023 International GT Open

The 2023 International GT Open was the eighteenth season of the International GT Open, the grand tourer-style sports car racing series founded in 2006 by the Spanish GT Sport Organización. It began on 30 April at the Algarve International Circuit and will end at the Circuit de Barcelona-Catalunya on 22 October after seven rounds of two races each.

Points systems
Points are awarded to the top 10 (Pro) or top 6 (Am, Pro-Am, Teams) classified finishers. If less than 6 participants start the race or if less than 75% of the original race distance is completed, half points are awarded. For the Endurance Race (Spa) points are multiplied by 2. At the end of the season, the 2 lowest race scores are dropped; if the points dropped are those obtained in the Endurance Race, that will count as 2 races; however, the dropped races cannot be the result of disqualification or race bans.

Overall

 * Note: National sporting body Real Federación Española de Automovilismo invalidated the results of Race 2 at the Red Bull Ring, on an appeal by Team Motopark concerning safety car procedures in the race. The decision provisionally saw Eastalent Racing take both the teams' and drivers' title. However, a subsequent appeal by Optimum Motorsport was heard and upheld by the FIA's International Court of Appeal in January 2024, with the Red Bull Ring results reinstated and Optimum crowned drivers' champions.

† – Drivers did not finish the race, but were classified as they completed over 75% of the race distance.

Pro-Am
† – Drivers did not finish the race, but were classified as they completed over 75% of the race distance.

Am
† – Drivers did not finish the race, but were classified as they completed over 75% of the race distance.

Teams' championships
Two (2) best results of each team is counted towards the championship.