The news is a welcome boost to the English side, as they prepare for their Heineken Cup quarter-final against London Wasps.
Boer, who is currently in his fourth year with Gloucester, was delighted to sign up, and commenting on www.gloucesterrugbyclub.com he said: 'Gloucester Rugby Club is a home from home for me and from day one I felt welcome. Everyone around this club is so passionate about rugby, and you can't ask any more as a player.'
Gloucester's director of rugby Nigel Melville added: 'We're obviously delighted that Jake has signed up for the next three years. Securing his future at Gloucester Rugby Club is a statement that fits in with our long term planning. Jake's a quality individual that represents what is so good about this club.'
Since his debut four seasons ago, Boer has made 111 competitive appearances for the Cherry and Whites in all competitions, and scored 19 tries.
The South African, who was awarded the Zurich Premiership Player of the Season last year, has had some memorable moments with the Gloucester club, and looking back over the last few seasons, Boer said: 'There have been some great times here. Playing in the Heineken Cup has been memorable, and being made captain was both a shock and a highlight.
'Silverware is a great incentive for everyone, and after winning a Zurich Championship and a Powergen Cup you get to know what that feeling is like, and that's one of the reasons I'm pledging my future to the Club.'
Looking ahead to the forthcoming weeks, that see Gloucester tackle vital Zurich Premiership action as well as a Heineken Cup quarter-final, the 28 year-old club captain said: 'The next few weeks are an important time and we need to win our remaining four games in the Zurich Premiership.
We have to perform, and we've now got players returning from international duty, so there are no excuses. We had the momentum going a few weeks ago and we need to get back into that.'