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Boss GKC-AD GK Guitar Synth Converter - 13 Pin to Serial

Drive the next-generation Boss Serial GK interface from a Roland GK-3 or GK-3B Divided Pickup.



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Product Description

The latest Boss guitar synthesizer products feature the Serial GK digital interface, a newly-developed connection method that delivers evolved performance over the analogue 13-pin GK interface used in earlier Boss and Roland guitar synth and modelling products. The GKC-AD GK Converter allows you to drive the Serial GK input on the GM-800 Guitar Synthesizer from a Roland GK-3 or GK-3B Divided Pickup, or an instrument equipped with a 13-pin GK output.

Key Features

  • Converts analogue 13-pin GK pickup systems to the newly-developed Serial GK digital interface.
  • 13-pin GK input and Serial GK output.
  • Instrument output for passing normal guitar/bass pickup sounds embedded in the 13-pin connection.
  • Compact and rugged metal design.


  • Nominal Output Level: -10 dBu (GUITAR OUT)
  • Recommended Load Impedance: 10 k Ohms or Greater (GUITAR OUT)
  • Current Draw: 240 mA
  • Power Supply: AC Adaptor (Included)


  • GK IN Connector: 13 Pins DIN Type
  • GK OUT Jack: 1/4-inch TRS Phone Type (for BGK Cable Only)
  • GUITAR OUT Jack: 1/4-inch Phone Type
  • DC IN Jack
  • USB Port: USB Micro-B (Program Update Only)

Weight & Dimensions

  • Weight: 340 g / 12 oz
  • Dimensions (W x D x H): 115 x 92 x 36 mm / 4.528 x 3.622 x 1.417 inches

Accessories (Included)

  • AC Adaptor
  • Owner's Manual
  • Leaflet (Using the Unit Safely)

Options (Sold Separately)

  • Serial GK Cable: BGK-15, BGK-30

Customer Reviews


1 review





Trusted Customer11th Nov 2023

If you want to use your older GK guitars with the new GK serial interface for the GM-800, you don’t have many options, but it’s well built and does the job. Only four stars because the unit should also have had a 13 pin through in the same way as the GKC-DA has a serial through. This means yet another box on my crowded pedalboard. And it’s a bit pricey.

Value 3Looks 4Durability 5Sound 4

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.