Here's some: Timog or Tomas Morato Area in Quezon City. Then there's Ermita in Manila. Greenfield District in Ortigas Center seems to be popular recently. Hope this helps.
For some content magazines, we have Attitude, Thai edition, but it's in Thai. You can also try Glow, but it's not exclusively for gays. These are not nude magazines.
For R-Rated to X-Rated magazines, there are plenty… KFM, Step, Full, Moment, Snake Plus, TUFF, Stage, ...