Gillian's most recent credits include THE LOST O'CASEY (Winner of BEST NEW PLAY Irish Times Theatre Awards 2019), TORCH, HENTOWN and JUDGING SHAW directed by Louise Lowe for Anu Productions. FUTUREPROOF directed by Tom Creed and THE ODD COUPLE directed by Conor Hanratty both for the Everyman Palace Theatre, Cork.
Further theatre credits include THE PLOUGH AND THE STARS directed by Wayne Jordan (The Abbey Theatre and British/Irish tour), JUNO AND THE PAYCOCK directed by Howard Davies (Abbey Theatre and National Theatre, London co-production). She played the role of Shelly in the four-hander THE SYLVIA at Smock Alley (which was the first play written by Irish short story writer Philip St John), TRAITOR written and directed by Shane Mac An Bhaird WAITING FOR ELVIS, directed by Mark O'Brien at the Axis Theatre, COUNCIL OF NICEA directed by Iseult Golden at Smock Alley Theatre, WUTHERING HEIGHTS (City Theatre Co.), MRS. WARREN'S PROFESSION (Yew Tree Theatre Co.), THE PLAYBOY OF THE WESTERN WORLD directed by Garry Hynes as part of DruidSynge.
She was nominated for Best Female Performance for her roles in MR. KOLPERT and PLATONOV in The Rep Experiment (Once Off Productions) performed during the 2007 Dublin Fringe Festival.
Screen work includes roles in 13 STEPS DOWN directed by Marek Losey for ITV and John Crowley's feature BROOKLYN starring Saoirse Ronan and Domhnall Gleeson.
Gillian graduated from the Bachelor in Acting Studies course at the Samuel Beckett Centre, TCD, in 2003. She also won a scholarship and trained at the British American Drama Academy, Oxford in 2002.
She is based in Dublin.