Gabriel trained at Drama Centre, London.

Gabriel performed at the Sam Wanamaker Festival in 2017

Previous theatre credits include: Either (Hampstead Theatre), Time is Love (Finborough Theatre), Dealing with Clair (Orange Tree Theatre), A Gym Thing (Small Things Theatre), No One is an Island (Tangle).

Television credits include: Hana series 3 (NBC Universal / Amazon), Ridley Road (Red Productions), War of the Worlds series 2 (Urban Myth Films), Cursed (Netflix), Game of Thrones (HBO), Berlin Station season 3 (Epix), Brexit: The Uncivil War (House Productions / Channel 4), The Bisexual (Hulu / Channel 4), The Informer (Neal Street Productions).

Film credits include: The Beautiful Game (Netflix) and 1917 (Neal Street / Amblin).