Sadly, at the moment Gambit is stuck on Excalibur. It's not the book with the best premise or the most knowledgeable X-Men writer in the world. To be honest, it has next to nothing to do with Gambit's character - outside of the fact that it's based around magic and Gambit is a Harry Potter fan, something I'm sure Tini Howard has no idea about.
The best I could figure why he's there is because he's married to Rogue. I don't think that's a good idea or even makes sense. Being married doesn't mean you have to be with each other all the time. Being an X-Man is very similar to having a job. In my experience, when two employees are involved, especially married, it's in everyone's best interest to separate them professionally. It helps avoid conflicts, moreso in case one is a higher authority than the other.
Cyclops and Jean were together and married for years without ever being in the same book. During the 90s Jean spent most of her time in Uncanny while Cyclops led the blue team in "X-Men". It wasn't until the later parts of the decade were they on the same roster before hia death, and then her death in early 00s.
Of course, being married Gambit and Rogue would have to cross paths. With both alive and operating out of the same base (Krakoa) it would only make sense for them to occasionally cameo together in each other's books.
Gambit's involvement with magic and the occult only went as far his various X-Men adventures, the voodoo he'd have to encounter being from Marvel's NOLA, and his trip to Otherworld as a "favor" to Pete Wisdom. Gambit has much more in common with just about every other book currently in the X-Men catalog.
Fallen Angels- though unceremoniously cancelled by Marvel, was a book starring Kwannon, Kid Cable and X-23 (it had others by time the book ended). It had the three running off-the-book ops, personal to Kwannon, with some direction from Magneto and Mr Sinister (this era's best iteration of him I might add). Gambit's inclusion here would have made sense.
Kwannon has no footing in the world, X23 has no connections and Kid Cable is still basically a stranger. Gambit's an international wonder with deep connections in the underworld thanks to his past life and present position as the King of Thieves. It would have been one of the most organic of fits. Would have helped give the book some star power too.
New Mutants- no real connection there - at all. Past that I would have loved to see him aboard the Star Jammer - but again, no use or connection here
X-Men - X-Men is mostly an anthology series with a revolving cast and story. You could only really expect a one and done story here
X-Force- this is just as much a no-brainer as any. X-Force is a black ops team created to covertly gather information and quietly eliminate threats. Gambit may not be up for killing people all the time, but if Beast and Jean are on this team - Gambit should be a shoe in. Period.
Unlike everyone else, Gambit has his own supply line and information network that's unavailable to his teammates. He'd be invaluable in information gathering and keeping tabs on people of interest abroad. Possiby even having people brought in or gaining access to them without involving Krakoa at all, again thanks to his position in the International Thieves Guild.
Marauders - For @&#_ sake they are a team of smugglers. They're normal story revolves around doing illegal activity and being places where they aren't supposed to be. How the ##&# did Gambit not end up here? Of course it comes back to his connections with the Thieves Guild. He Lord's over the exchange of stolen and black market goods. It'd be idiotic to think that his organization wouldn't be chief among those dealing Krakoa goods.
At the very least he should be making cameo appearances in this book from time to time.
X-Factor - a new book written by Leah Williams is what it's been for a long while - a quasi-procedural mystery/investigations title. Probably less Gambits speed than X-Force, Fallen Angels, and Marauders - yet it still makes more sense or his usage than Excalibur. This group will be looking into disappearance of mutants. Gambits information gathering apparatus would be useful here, if not completely O.P. to the point of being broken.
The rest of the books are solos; Wolverine, Cable, and Juggernaut - there's Children of the Atom but unless it's truly an otherworld story about the Chimera - I'm ignoring that in hopes it disappears.
If you could place Gambit on any other of the above titles, what would it have been? Give two options, and why.