Using 120v GFCI outlet for 240v AC Source
You want to use Euro-style RCD equipment for this

The Filipino power system can be treated as a split-phase, no-neutral (hot-hot) system using TT earthing (Terra-Terra, where the source transformer is connected to an earth electrode and local metal parts are connected to a different earth electrode, but there is no conductor connecting the two earth electrodes).  As a result of this, North American distribution equipment is only marginally suitable, as much of it assumes that an earthed neutral is distributed.

Instead, I would use two-pole (1P+N) Euro-style circuit breakers and RCDs (RCBOs, preferably, even, so that local socket-outlets can be used) -- however, instead of a single RCCB or RCBO incomer for the entire system, I would use a regular CB for the incomer and RCBOs with 10mA or 30mA residual (differential) trips for the individual circuits.  If you really want to use socket-outlet style equipment, SRCDs can be obtained and used with 10mA trips, but they have the disadvantage that they may not come in a suitable socket style for your local plugs.

(Furthermore, this is forward compatible to what the power utility wants to do over there, which is get you converted over to the IEC/Eurostyle system, full stop.)