Are there gay porn conventions?

Yeah OP - It's called RentMen.com.

There used to be Adult Entertainment Expos with gay participation (although it was 90% hetero stuff). I met Tiger Tyson at one of them.

The Grabbie Awards in Las Vegas. And the local gay campground just had a content creator weekend and I was surprised at the name talent they brought in.

What local campground was this, pray tell?

And what talent did they pull?

The porn convention used to be the same weekend as CES in Las Vegas. It added a certain something.

There is Gay Video Awards. It's not a convention, but I think the public can purchase a ticket to attend.

Do the old gay performers go, r6?

Southern Decadence is coming up. One would think the porn industry would take advantage of this and do some kind of side event.

The way I read OP's question is that he is wondering if there is a fan convention that features old gay porn performers, like a Star Trek convention would have gave past actors there signing memorabilia. So not a convention that is just an expo of the current adult business.