Can you put your feed rates next to your g3 and g2 direct and the back to the faster feed rates when going back to g1 thats what I have done on my Bridgeport and about to try the same on my Arrow.
G1 x110 y0 f300
G2 x 120 y-20 p10 f100
G1 x120 y-50 f300
Dont know if this is what your kooking for,I think theres also a g code that does this to in the book somewere but I cant remember where.Hope this is of some use.