BOSS GA-FC Guitar Combo Foot Controller | Guitar Center
Haven't seen a lot of examples of boards that implement the GA-FC, so here's the one I just put together! (Also posted in r/guitarpedals) : r/BossKatana
GA-FC Impressions
Boss Katana-100 MkII 100W 1×12 Combo Amplifier, Boss GA-FC GA Foot, 1/4 Cable Bundle | ProSoundGear
Boss Waza Tube Amp Expander with GA-FC Foot Controller at Gear4music
Boss GA-FC GA Foot Controller | Reverb Australia
Boss GA-FC Foot Controller | zZounds
Boss GA-FC Foot Controller - 761294503096
Using a Roland GA-FC footswitch with Boss Katana 100w amplifiers - YouTube