I mean emulate GBA, and also a thingy so you can stick a GBA game into a smc slot like this:
_______ __________
| | |-----------
| GBA | |Adapter | SMC SLOT
| GAME | | | --------------
| | | |
|----------| |------
The pic is a bit unclear, but it is a GBA game that sticks into a adapter, and the adapter sticks in the card slot, when you boot the GP32, you see only one file, the GBA emu, then once you open the emu, it launches the GBA game automaticialy. If GamePark dosen't like emus, they can add security, by putting a unique number on the card that normal SMC cards can't have, so noone could pretend that they are using it on the same card, and copy the emu.