Gwynfor trained at the Webber Douglas Academy. His theatre work includes: Far From the Madding Crowd (English Touring Theatre), Chains of Dew, Trifles and The Outside (Orange Tree), Othello (Creation Theatre Company), A Christmas Carol (Tabard Theatre), Tons of Money (Riverhead Theatre, Louth) and The Resistible Rise of Arturo Ui (Watford Palace Theatre).
Television includes: Titty Bang Bang.
Radio includes: 20 Minutes: A Great Silent Tenderness.