GK-5 Divided Pickup Divided guitar pickup for BOSS guitar synthesizer products with the Serial GK interface. View Product GK-5B Divided Pickup Divided bass pickup for BOSS guitar synthesizer products with the Serial GK interface. View Product GKC-DA GK Converter Drive BOSS and Roland 13-Pin GK Devices from the Next-Generation Serial GK Interface. View Product GKC-AD GK Converter Drive the next-generation BOSS Serial GK interface from a Roland GK-3 or GK-3B Divided Pickup. View Product BGK-15 Serial GK Cable Serial GK cable with straight 1/4-inch TRS connectors, 15 ft./4.5 m length. Also available in 30 ft./9 m (BGK-30) length. View Product GK-3 Divided Pickup Divided pickup offering possibility of GK-devices to guitarists. View Product GK-3B Divided Bass Pickup Divided pickup offering possibility of GK-devices to bassists. View Product GKC-5/-10 13-Pin Cables Special cable to connect GK-compatible guitar gear. View Product US-20 Unit Selector Floor pedal unit to control and switch between two GK-compatible devices. View Product