Help us help you.
What exactly did you load onto your SMC?
What kind of GP32 do you have?
Did you read the Readme file for said emulators?
We need specifics, please.
Edit. BTW, only a scant few GBA roms work, the thing is not worth usung at the present time, it's still early in development.
If you want to play GB or GBC games, use Ryleh's GBC emulator.