Hi i'm getting a Roland GK-20 with the hex pickup thing. But i want to know some stuff. Seeing as it is a MIDI pickup does that mean that i can plug it into synths/keyboards with MIDI inputs and get those sounds on my guitar? Also i have a mac, and i have garageband-it has loads of software instruments that can be controlled via a MIDI keyboard, does that mean i could contol it with my Guitar?

And lastly, If i put the MIDI pickup on my guitar, could i buy the Korg MS2000BR and put it on a rack and get all the synth sounds and arpegios of it and onto my GEE?