To anyone using a GC and wanting to only have one cable running to the Kemper. This cable will provide power to your GC, with the power adapter on the other end. It works great.
http://www.rocktron.com/rocktron-midi-cable-5-to-7-pin.html
Voodoo Ground Control cable
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I have that very cable, the only minor issue I had with mine is that the barrel connector on the power supply didn't make a solid connection in the pigtail connector on the Rocktron cable, a little creative tweaking with a small screwdriver took care of that.