A turbo kit for a GSR will bolt up fine on your car, but i dont reccomend a GReddy turbo kit, they dont make much power.
I would go with a drag kit or for more money a south florida performance kit.

As far as additional parts go, i would definetly get something to do some finetuning with, if you can afford it buy a hondata 2b, if not atleast get a VAFV or fields fuel controller. Other than that, maybe get a turbo timer.