>>30863647MeleMele island as a whole is pretty small to have more than one Gym, really, so it's got to be on Hau'oli; I don't think Paniola Town fits for a Gym, turning the golf track into a Gym would be better and it actually has textures as of now, it's just not used, so there's one additional Gym.
I do think the one on route 15 is a little bit of a reach, but there's also pic related on Tapu Village, right next to the PokeCenter that could very well turn into a Gym.
My bet is that the last Gym could be in a hypothetical rebuilt Po Town, with Guzma as a Gym Leader. That would be incredible.
