That's the old one not the GV-2. I'm trying to figure how many more pedals i can fit on my dc brick before i need another one.
The original requires a 9V adapter, so you'll be fine with your DC Brick.
According to http://www.stinkfoot.se/andreas/diy/power/list.htm the old Guv'nor draws 4.9 mA.
i thought DC bricks had the same current for all outputs no matter how many you plugged in... mine (soundlab pedal power 450) has 75mA on all 6 outputs regardless of what else is plugged in.