is the Total 24 Hours of Spa, which has run as part of SRO championships since 2011. GT World Challenge Asia was created in 2017 as Blancpain GT Series Asia. GT World Challenge America was for many years known as Pirelli World Challenge before being acquired by SRO in 2018. GT World Challenge Australia will become the fourth series to join the global championship in 2021. GT4 Series Launched in 2006, the GT4 class sits below GT3 in terms of performance and is aimed at amateur drivers and aspiring professionals. The concept is owned by SRO, with each series either directly promoted by the company or organised through franchise agreements. A wide variety of cars are homologated for GT4 competition, many of which are considerably closer to their road-legal counterparts than those found in GT3. The GT4 European Series, FFSA GT Championship and GT4 America Series are some of the leading categories reserved solely for GT4 machinery, while others, such as the British GT Championship and GT World Challenge Asia, run mixed grids of GT3 and GT4 cars. Other GT series Fanatec GT2 European Series Formerly known as the GT Sports Club, the series with an emphasis on gentleman drivers, GT2 European Series is a championship for Bronze, Titanium and Iron drivers only. The Titanium categorisation is within the Bronze category, for drivers between the age of 50 and 59. The Iron categorisation is within the Bronze category, for drivers over the age of 60. Originally the GT Sports Club are contested with GT3-spec, RACB G3, GTE-spec and Trophy cars but during the COVID-19 induced hiatus it was re-organised for the new GT2 regulations and changed the name to GT2 European Series. It supports the GT World Challenge Europe in various circuits along its calendar. British GT Championship Originally created by the BRDC in 1993, the British GT Championship has been overseen by SRO Motorsports Group since 2004. Races feature both GT3 and GT4 cars on-track at the same time, while Pro/Am driver line-ups are the bedrock of the series. The 2021 season is set to consist of seven domestic events and an overseas rounds at Spa-Francorchamps, as well as a revised class structure. Touring Car Series TC America Series FFSA TC France Other events FIA GT World Cup FIA Motorsport Games SRO E-Sport GT Series (with Kunos Simulazioni and Ak Informatica) Curbstone Track Events Former series BPR Global GT