Thanks for the replys. I don´t understand tagalog but i think the best way is what i choose here.
I joined coins ph because of there free withdrawal @ATM but this service is not available and no information for how long.

This might be the best way now, btc > coins btc wallet > coins ph > gcash
but for me not ideal. you get a bad price for the conversation + the 2% fee to gcash. at the end you have to pay about 4-6% (included conversation).