Gerald was born and raised in Belfast, Northern Ireland, and emigrated to Australia with his family when he was 16. He started acting while at university in Australia and spent 3 years as an actor/teacher before moving to London to study at the Drama Studio, from where he graduated in 1977.

Since then he has had a wide and varied career: on the big screen he played Tessek – Squid Head and the Mon Calamari Officer in Star Wars: Episode VI – RETURN OF THE JEDI, and was a puppeteer on LITTLE SHOP OF HORRORS, operating Audrey 11, the man-eating plant. Recent films include LONDON BOULEVARD, Hideo Nakata’s CHATROOM, and WHERE I BELONG.
His many TV appearances include CASUALTY, SCARLET AND BLACK, JENNY’S WAR, KEEPING MUM, HARRY’S MAD, SHANE, TIME GENTLEMEN PLEASE, SITUATION CRITICAL, PAUL DREAMS OF BETTE, and two series of THE BOOT STREET BAND. He also worked on SPITTING IMAGE as a puppeteer.

In the West End of London he appeared in THE BLUE ANGEL for the Royal Shakespeare Company at the Gielgud Theatre, in THE ARABIAN NIGHTS at the Arts Theatre and for a year in the farce NO SEX PLEASE – WE’RE BRITISH at the Strand Theatre. Other theatre work includes A CHRISTMAS CAROL in Oxford, THE WIZARD OF OZ and THE WINTER’S TALE in Exeter, THE GINGERBREAD MAN and a season of new plays in Milford Haven, and national tours of DREAMS OF ANNE FRANK, SALAD DAYS and BELL, BOOK & CANDLE.
In Wimbledon, London, where he lives, he has appeared in A MIDSUMMER NIGHT’S DREAM and ALICE IN WONDERLAND at the Wimbledon Theatre, and in 10 plays at the Polka Theatre. Favourite roles at Polka include Dr. Livesey in TREASURE ISLAND and Professor Moriarty in a new Sherlock Holmes play written by Philip Pullman.

He is still probably best known to many people as the original Mr. Muscle in the long-running series of TV commercials which were shown throughout Europe and as far away as South Africa, Australia and New Zealand. He has also made commercials for Belgium, Germany, Holland and Ireland. Voice work includes voice-overs and readings for BBC Radio.