Puerto Vallarta [1] offers a wide variety of gay-friendly hotels, villas, and B&Bs. All of the properties listed below advertise in the local gay media and the majority, if not all, are gay-owned. Many are located in the Zona Romántica, an appealing gay-friendly neighborhood south of the Río Cuale in downtown Puerto Vallarta.
Links:
[1] http://www.moon.com/destinations/puerto-vallarta/puerto-vallarta