Shuler Donner spoke with Empire and flat out told them she is trying to make a stand-alone Gambit movie:
"I'm dying to do a Gambit movie with Channing Tatum that doesn't have to be a great big movie. It's a thief in New Orleans, it's a whole different story. He's on board, and I have to get the studio on board. How can anyone resist Channing? He's such a sweetheart."
Channing Tatum had this to say about the potential project:
“I would like to play Gambit. Gambit’s my favourite. I’m from New Orleans, around that area. My dad’s from New Orleans, and I like to do a Cajun accent. I could do it for real. No knock on Taylor Kitsch, though, ’cause I actually like his Gambit, but I’ve always lived around Cajun people. Gambit was always like the woman-loving, cigarette-smoking, drinking guy. He was the punk rock of all the superheroes. He’s a thief. He kind of rode the line.”
Given the fact that Fox seems fully resistant to bring a much desired R-rated Deadpool movie to the big screen, Gambit could be a nice bet for a low level X-Men movie. You wouldn't need a lot of mutants to appear and due to the nature of the character, it probably wouldn't get anything worse than a PG-13 rating. I don't think Channing Tatum would necessarily be my first choice to play Gambit, but he definitely couldn't be worse than Taylor Kitsch was.