Kukri will never be for GP when it's already ZP.. And Kukri Camo - if it'll ever come, will probably be ZP.
I just think we need a GP Knife. I don't have a permanent axe, so it's kind of basically buying ZP knifes and then they only stay temporarily.
If there was a GP knife though, it'd obviously be stronger than the knife, but weaker than the axe. Then again, I can be wrong. You never know.