Boss Katana 100 MKII Guitar Combo with Effects inc GA-FC Footswitch - Music 2000 Ltd
Boss GA-FC – Thomann UK
BOSS KATANA ARTIST MKII GUITAR COMBO AMPLIFIER
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
Guitar Pedal X - GPX Blog - Boss's new GA-FC-EX Foot Controller Massively Expands on the Control Capabilities for Katana Amps
Boss FS-6 Double Footswitch | Bonners Music
Boss GA-FC Controller Footswitch | DV247
Boss Katana | 2x12 Guitar Amp Package
The Magic Flute - Boss FS-6 Dual Footswitch (Katana 50 Compatible)