The 2021 GT World Challenge Australia Powered by AWS was an Australian motor sport competition for GT cars. The series incorporated the "Motorsport Australia GT Championship", the "Motorsport Australia Endurance Championship", the "GT3 Trophy Series" and the "GT4 Cup", however the Endurance Championship could not be contested due to the COVID-19 pandemic. The Motorsport Australia GT Championship was the 25th running of an Australian GT Championship. This was the first season of the championship being jointly managed by Australian Racing Group (ARG) and SRO Motorsports Group.