Gonet trained at the Royal Scottish Academy of Music and Drama and is known for playing Beatrice Eliott, one of the two lead roles, in three series of the television drama The House of Eliott, and Chief Executive Officer Jayne Graysonin the medical drama Holby City. She also has appeared in Casualty, The Crow Road, Dalziel and Pascoe, The Inspector Lynley Mysteries, Foyle's War, Outnumbered, Lewis and played a villain in the mini-series The Secret.
In 2005 Gonet married English actor, Nicholas Farrell (the couple co-starred in an episode of The Roman Mysteries as Queen Berenice of Judea and Emperor Titus, and as Mr. and Mrs. Musgrove in ITV's 2007 production of Jane Austen's Persuasion). Gonet has one daughter, Natasha born in 2000. She comes from a family of twelve children and four of her sisters are nurses. Gonet's nephew, Stefan Gonet, is currently a goalkeeper with Clydebank F.C..