Gidman is the younger brother of Gloucestershire captain Alex
Gloucestershire have signed Durham all-rounder Will Gidman on a two-year deal.
The 25-year-old, who is the younger brother of Gloucestershire captain Alex, was on the club's books until 2006 before leaving for Durham.
"I have absolutely loved my time at Durham but I need to focus on where I'm going to get the best cricketing opportunities," said Gidman.
"I'm keen to push on and hopefully I'll be able to significantly contribute to the side at Gloucestershire."
Gidman is a right-arm seamer and left-handed bat.
His first-team appearances for Durham have been limited to one-day games with his best figures coming against Hampshire this season where he took 4-36.
Gloucestershire's director of cricket John Bracewell said: "It is great news at the return of Will Gidman after a period of five years away with MCC young cricketers and then Durham.
"Will has developed into a fine all-round cricketer and it is fair to say that the experience in a club of the likes of Durham has been a great finishing school which Gloucestershire will reap the benefits of."