The series underwent changes in 2013, retaining GT3 cars as the mainstay, but creating sub-classes for Pro, Pro-Am and Gentleman driver line-ups.
The series commenced at the Circuit Paul Armagnac in France on 1 April and ended at Baku World Challenge in Azerbaijan on 24 November.
The six-event calendar contained largely the same events as FIA GT1, with the addition of a race at Circuit Park Zandvoort in the Netherlands.
The final round was originally scheduled to be held at a venue in the Middle East before organisers came to an agreement to hold the race on the streets of Baku in Azerbaijan instead.
Individual drivers were required to participate for a minimum of 25 minutes in order to earn championship points in any race.