As mentioned, if you talk about gay pairings as if they will happen in the limits of the show, under the impression it's controlled by writers, then no, they won't happen, unless it's a temp chara or CotD. But neither will 99.8% of the straight pairings that anyone supports. It all leads to: unlikely. Of anything.
On the flipside, if you think about the fandom in terms of it working like reality and NOT within the realms of being controlled by the writers, then any pairing goes, gay or straight, dependant on what's known about the characters in and of themselves. Conclusion: people are allowed their fun to 'ship what they want, and what they see as hints is valid in any debate (if there is anything to see; Paul/May is pretty popular for being a never-met), whether or not the Almighty Writers are intending it to mean diddly-squat.
You better start accepting which you're gonna be debating over, else anyone who argues for anything but Contestshipping is on the losing end. ...No, I'm not a Contestshipper, for the record.
And just in case:
In the Special manga, Gracefulshipping is canon, and Originshipping has its zomg subtext. In the game-verse, most Originshippers take the interaction from there, where there's also subtext if you see it like so, but Wallace and Winona don't meet on-screen. In the anime, none have met on screen. It all adds up to this: honestly, who cares? Gracefulshipping is canon in one isolated medium, a sub of a sub, and taking just as many liberties as the anime. Two mediums (one being the overall main one) have canon interaction for Originshippers to suss out and enjoy. The anime allows for speculation only, because that's all they have.