Be advised that the FRS and/or GMRS radios sold in the US are NOT legal for use in the Philippines. FRS/GMRS operates in the 462 and 467 MHz band. Using a FRS/GMRS radio here may interfere with legitimate users of said bands.
Instead, the Philippines use the SRRS band on 325 MHz. This is the NTC-approved band for unlicensed 2-way radio use. Well, you only pay for the NTC license once when you buy the radio and it's perpetual.... no annual license renewal required.
For local availability, check out 5th Avenue Electronic City.