Credydau theatr yn cynnwys:
MACBETH (Theatr Genedlaethol Cymru), BOUNCERS, THE 39 STEPS, Boeing Boeing, Neville's Island, Up 'n Under, Romeo & Juliet, BEDROOM FARCE a Oedipus (Black Rat Productions), GRAV (Torch Theatre/Wales Tour & Edinburgh Fringe 2015), TRIPTYCH (De Oscuro), THIS IS A PLAY WITHOUT A TITLE (Lucid Theatre), PETER PAN (RCT Panto), ROBERT GOLDING (3D Theatre Company) a RICHARD PARKER (3D Theatre Company/Fringe Management/Darkman Productions), The NORMAN CONQUESTS and ONLY A MATTER OF TIME (Torch Theatre), ROMEO & JULIET (Clwyd Theatr Cymru), HAMLET a ROMEO & JULIET (Wales Theatre Company), TRIVIAL PURSUITS (Grass Roots Productions), MA BILI’N BWRW’R BRONCO (Wales Millennium Centre/Theatr na nÓg), TO KILL A MACHINE (Scriptography Productions), MACBETH (Broadway Theatre), BUZZ (Sherman Cymru), ASSEMBLY WOMEN (Alternative Theatre Company).
Credydau teledu yn cynnwys:
REQUIEM, THE INDIAN DOCTOR a HIGH HOPES (BBC), POBOL Y CWM, Y PRIS, COWBOIS AC INJANS, ROUND A ROUND (for S4C)
Credydau ffilm yn cynnwys:
APOSTLE (Severn Screen), THE DARKEST DAY (Lindisfarne Films) a SMALL COUNTRY (Green Bay Media).
Mae gan Gareth lawer o brofiad fel artist dros leisio ac wedi lleisio promos a hysbysebiadau ar gyfer S4C, Global Radio a Real Radio yn ogystal ag amryw o wefannau addysgol.
Hyfforddodd Gareth yng Ngholeg Brenhinol Cerdd a Drama Cymru (RWCMD).