I highly recommend the Strymon Zuma. It fits perfectly under my Temple Audio board and powers high current pedals like my Boss ES-8, two H9s, an Elektron Analog Drive, and several other pedals without breaking a sweat.
Thank You – I love it. Zuma provides 500mA, which the GigRig G2 requires, so it should work. I saw Styrmon came out with a Zuma low profile, but sadly it less power outputs.
Out of curiosity, how did you mount the Zuma under the board, did you mount it using the plates they have for the pedals? ….OR….. did you use something else like QuickLock or Velcro?
I used one medium Temple quick mount plate to mount it under the board.