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
Kat Preset Footswitch - Bright Onion Pedals
GA-FC : Footswitch Boss - SonoVente.com - en
Katana - Selecting effects using GA-FC
Boss KATANA-50 Mk II Owner's Manual | Manualzz
Boss katana 100 mk1 with GA-FC footswitch amp, Hobbies & Toys, Music & Media, Musical Instruments on Carousell
The GA-FC: Unlocking Performance Potential with Your Amp
BOSS - GA-FC | GA Foot Controller
Boss Katana 50 MKII 1x12 Combo with FS6 Footswitch and Cover at Gear4music
Differences between the Katana footswitches?
Boss katana 50 footswitch question | Fender Stratocaster Guitar Forum
Boss GAFC GA Foot Controller | MIDI Footswitches & Pedals - Mannys Music // Mannys Music
BOSS Guitar Combo Amplifier Owner's Manual - Manuals+
Katana 50 first impressions, well,,, | Page 2 | The Gear Page