The series consists of events in various European countries which feature two races over a weekend.

Three of the six rounds were joint events for the Open and the Spanish GT Championship.

In early seasons, a few races have been a part of the World Touring Car Championship support package.

Each race consists of a field of grand touring-style cars broken into different classes based on power and weight.

Starting in 2015, the International GT Open began using only FIA GT3-spec cars with 2 sub-categories.