The first weekend in June there is a large gathering of gays in the general Orlando area.
On the first Saturday in June they have a tradition of gathering at the Magic Kingdom. It is also traditional for them to wear red tee shirts while they are there.
I think it's the 3rd through the 7th. They will be at MK Sat the 7th (of June). On their website I read they also have plans in the evening that week at one of the water parks and MGM but it would be after hours or maybe the parks may close a little early? Not sure what the website is but I found a link here somewhere