Gaiters were never allowed.
Hotel guests have been told this for more than a week now. It has always been in the 'know before you go' documentation that no one really read throughly (myself included). It was not enforced or even mentioned during CM previews at MK on the first day. Not sure if they changed that going forward but my DH and DS wore gaiters all day and no one said a word. I brought standard masks just in case but no one said anything so I figured it wasn't an issue. Now I see it everywhere that gaiters aren't allowed so they will have to make the choice whether to go back to the parks and wear a standard mask or stay away for the time being.