His first major role was as Gurpreet "Guppy" Sandhu on
Casualty (1986) from 2004-2007, airing on BBC One. From this role, Gabel was nominated for "Best Newcomer" at the 2005 National Television Awards (UK). He also portrayed at least two other characters on "Casualty", before being cast as Guppy: Jean-Claude Tournier in a 2001 episode, and Jude in a 2004 episode.