[Randall-in-Mpls]

If you want a spoked wheel with GSXR forks, I'd forget the stock hub and look for a wheel that will fit the GSXR axle, or be adaptable using stock bearings. You'll also want the GSXR brakes, which will be a big improvement over the CX's stock brake, in addition to being a direct fit to the forks. Ideally, you'll find a wheel that fits both the axle and the brakes with minimal adjustment.
There's a US manufacturer who makes a custom spoke hub specifically for this application. I don't recall the name, but I imagine someone here will.

 

[Randall-in-Mpls]

CogitoMoto is the company I had in mind.
Some have made adapter rings to convert the stock wheel to spokes, but the machined hub would be simpler and safer.
And, since you'll be using non-CX forks, why reintroduce the CX hub into that mix? It's cleaner to merge two systems than three.

 

[Randall-in-Mpls]

Hi Randall,
I could not agree more with your statement. but at the sametime my goal is to have a cost benefit solution. I think that I will use the rings for the rear wheel and the cogitomoto front Hub (GSXR-750).

kind regards
Carlos

It will probably be more cost efficient to find an existing spoke wheel that can be adapted to the GSXR forks and brakes. With the CogitoMoto hub, you'd still need to source a rim and spokes.