What's the radius on the GK2?
I don't know but it is used on this guitar that has a 9.5 inch Radius.
Roland Ready Standard Strat Specifications
Series : Standard Series
(332)* Brown Sunburst add $50.00,
(380) Arctic White, (Polyester Finish)
Body : Alder
Neck : Maple, Modern C Shape, (Satin Polyurethane Finish)
Fingerboard : Rosewood, 9.5 inch Radius (241mm)
Number of Frets : 21 Medium Jumbo
3 Standard Single-Coil Pickups (Ceramic Magnets),
1 Special Design Roland GK-2 Synth Pickup