He is currently training with the Championship leaders.
Latics boss Paul Jewell told their official website
"I know Gareth well and he's a quality footballer who was player of the year when we got promoted to the Premiership at Bradford.
"He's coming here for a couple of weeks' training so we can have a look at him, and something may develop on that in the future.
"It's only a short-term thing for now, but I think Cardiff would be willing to let him go, so we'll see how it goes and then make a decision on him once we've assessed him to see where he stands fitness wise."