There is a lot of gay hotels in mexico. Specifically PV and Acapulco and some in Mexico City DF.
If you are going to the caribbean thats different. Kinda hit and miss. Nothing in the BVI's or AVI's. There was a gay nude beach but the authority's watch it like a hawk. There is a group of resorts called "hedonists" that has nothing less than roman style orgy's. You have to look on the net for locations.