The GT4 European Series is a sports car championship created and organised by SRO Motorsports Group.

It is a pro/am championship which utilizes SRO GT4 class cars, and runs alongside the GT World Challenge Europe as a support series.

Many national series also adopted the GT4 regulations as a lower class, and the European Cup eventually lacked the competitors needed to continue.

During the 2016 24 Hours of Spa, the Stéphane Ratel Organisation (SRO) announced that the European Cup would be divided in 2 different series for 2017.

The United States–based ACCUS offers the GT4 America Series promoted by SRO and sanctioned by the United States Auto Club for one-hour sprint races, and the Michelin Pilot Challenge sanctioned by the International Motor Sports Association for longer races (2-4 hours).