The gay acceptance on the island is at pretty high levels and the locals are very friendly, however a discreet behavior on public is recommended.
Andros is considered to be the destination for "sophisticated" LGBT travellers, who are not looking for parties and nightlife (although Mykonos is 2.5 hours away!)
Andros does not have an 'official' gay scene, but the wild beauty will compensate you. The majority of the local bars and restaurants have a gay-friendly atmosphere as well.
Vlichada Beach in Andros Island, located 12 km away from Kaminaki Beach, is highly preferable by gay swimmers. Going there, you should not also miss the opportunity to visit Pyrgos, a tiny beach just a few minutes away from Vlichada.