Murray founded GMA in 2017, with an initial focus on limited-run supercars. In 2020, GMA launched the
T.50, a lightweight, driver focused supercar as an ethos continuation from Murray's F1 project. A number of unique elements of the T.50 gained acclaim, including the 3.9 litre
Cosworth V12 engine which revs to over 12,000rpm and the ground-effect fan system, a nod to the
Brabham BT46B "Fan Car" that Murray designed for Formula One in 1978. Production began in 2023, and ended in 2025 after 100 units were producted. A number of T.50 customers are also McLaren F1 owners, with chassis 64 finished in the same specification as the owners F1.
Jamiroquai lead singer
Jay Kay is also a T.50 owner. A special T.50s
Niki Lauda edition was revealed in 2021, as a track only 25 unit production car priced at £3.7m. ==New headquarters==