Using a Roland GA-FC footswitch with Boss Katana 100w amplifiers - YouTube
Boss Katana-50 MkII EX Guitar Amplifier 50w Combo COMPLETE STAGE BUNDLE | KraftMusic.com
Boss Katana Artist 1x12 combo - w/footswitch
Affordable Boss Katana Footswitch: Ultra Hack! - YouTube
Boss GA-FC – Thomann United States
KATANA Ultimate Footswitch | AIRSTEP Kat Edition – XSONIC
Boss GA-FC EX Foot Controller for BOSS Katana Amplifiers | Sweetwater
Amazon.com: XSONIC Airstep Kat Edition KATANA MkII & I Footswitch with 5 Footswitches, 2 Control Modes(Change Presets, Toggle Effects), 300H Playtime, Modify Amp sound with BTS App for iOS and Android, Wirelessly :
Boss KTN-50 Katana 50 Guitar Amp + Boss FS-5L Latching Footswitch
KATANA Ultimate Footswitch | AIRSTEP Kat Edition – XSONIC
Boss Katana 50+ Multi-Effects Boss GT1+Footswitch | eBay
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