iPads don't run Mac software.

Unless I missed one, I've seen no arranger software for iPad.

Most of Giglad's storage requirements come from the soundset. I don't want to use their sounds, just want to use a GS soundset and then stuff like Pianoteq, VB-3, Numa Player etc...

I'd rather some of the majors took up this, their arranger engines are mature, bulletproof, fully featured, stable and familiar...