Yeah there was a thread made about this a while back but honestly, game controllers and Graal do not mix.

There was this tweak for jailbroken devices called ControllersForAll that allowed for Xbox, PS3 and PS4 and I think WiiU controllers to be used on the device.

It was a pretty damn good tweak and it actually worked even better than those expensive third party iPhone controllers.

Had little to no lag between the devices and pairing was pretty easy.

Tried it with Graal and the controls were all funky and you couldn't change the button layouts.

So basically, forget using those stupid rip-off controllers. They suck.