It looked like Gambit had a very brief cameo in Civil War 5. There's a page with shots of some heroes who are not in the battle listening / watching it on the news. Top box is Matt Murdoch, then under him is Gambit wrapped in a towel having just come out of a shower. I think the box below him is Black Widow, and the bottom box was Hawkeye. No spoken words or anything, just a quick glimpse, where if you blinked, you missed it.