i've looked into it and i don't think we'll allow it.

the listed emulator core for Game Play Color is GameBoy Online

the readme for the latter project states the following: "iOS just CAN'T run this well."

i'm personally unable to run any sort of tests to verify this, but i trust the word of the author of the emulator core here.

i'd also like to call on help from @Legs if they're around since i value their opinion on GB emulators in general.

don't forget mgba