I don't speak/read/write French and the web translator I used didn't do a very complete job, but I have always been under the impression their GT fairing uses several pieces from the "S" model to complete the job - like the headlight, mirrors and fairing mounted instruments. While you could do this with a "N" model, you'd have to buy these needed "S" model pieces on your own to complete the transformation... as they did below when they put it on a GSX1400
Here it is on a Bandit:
Now, if there was just an easy way to put the shaft drive system from a GSX1100G onto a B12 with this GT fairing, I'd never lust after a FJR.