sayqustionsaskanswers,
I apologise for the less than helpful responses that you have had above, I see that you have just become a member yesterday -- welcome.
Answers to your questions:
There is an old emulator that runs extremely slowly, perhaps 1 fps. This is called VBA and really isn't worth downloading.
However, there is a GBA emulator in the early stages of development that looks promising which is not functional as far as games are concerned, and probably won't be for a long time yet.
If you are thinking of buying a GP32 because you only want to play GBA games, then don't bother.
As for putting roms on the gp32_console , I would advise you install GPDrive and all you do is start the program on the gp32_console and plug in the USB cable -- windaz will detect the device like a plug and play harddrive and you simply drag-and-drop the games you want (you don't need wipe the whole card each time you use it like flash cartridges).
** Please be nice to newbies, these type of replies (yaustar excluded) probably scare away a lot of newbies who are the future of our community **