Gillian is a singer, writer, actor, musician, and comedian who graduated from the Western Australian Academy of Performing Arts (WAAPA) in 2010 with a Bachelor of Music Theatre.

Theatre credits include: Harry Potter And The Cursed Child (Sonia Friedman Productions, Colin Callender and Harry Potter Theatrical Productions); Vivid White (Melbourne Theatre Company); Company (Watch This); Loving Repeating (Vic Theatre Company); and The Pirates Of Penzance (The Production Company). Television credits: ABC Comedy Up Late, Upfront Gala, Tonightly, Offspring, House Husbands, Fat Tony & Co., Ricketts Lane, Get Krack!n, and Back In Very Small Business.

She has toured extensively with her solo shows as a comedian and cabaret performer, most notably at the Adelaide Cabaret Festival, Melbourne International Comedy Festival, Edinburgh Fringe Festival, and Leicester Square Theatre in London.

Awards include Best Cabaret (Melbourne Fringe), Green Room Award Writing (Cabaret), Green Room Award Artiste (Cabaret), Green Room Award Original Songs (Cabaret), Green Room Award New Australian Work (Opera).