it's yours. you can do pretty much what you want. i will not care if you lick it, use it as a spoon to eat yogurt, or if you put a string on it and use as car air freshner
but be carefull if you plan to build an atomic bomb with a gatewait and itunes, its illegal, dangerous and violates apple TOS..
well, do you have an exploit? what 3ds firmware and hax you got?
gatewait only's use now is ability to launch .3ds roms on a micro sd card (if you for whatever reason would like to use a secondary micro sd card and .3ds files
and it's cheat's plugin..
nowadays we got cfw and can do pretty much almost anything without a getaway card