GT8 and Peavey JSX...

[Themetallikid]

What would I need to be able to control the channels of the JSX with the GT8...I know its only a single relay, but I'm ok with just using two channels of my amp and such...but because the GT8 is midi, what extra cord(s) would I need.

I have a G major now, and have the JerryP cords to switch that...but I'm assuming those wont work...