GeorgeMorley
The Nismo GT-RS arent supercars
Greycap
That can be debated though
And it will be

Actually, it depends a lot on your definition of 'Supercar'.
There's plenty of debate around what is and what isn't a supercar, but the generally accepted boundary as far as top speed is concerned is if the car could reach a standard 155mph speed limiter, then it is fast enough in a straight line to be classed as a supercar. And any untuned Skyline GT-R from R32-series onwards has no trouble with that.
Of course, this isn't the only test you've got to pass before you get your supercar mortar-board. You have to be able to deal with corners as well (Perhaps Corvettes aren't supercars after all?), and with full reactive 4WD dealt out by the ATTESA-ETS, any untuned Skyline GT-R from R32-series onwards is capable of careful and steady race-car-style understeer or controlled oversteer.
Now that the dynamics part has been discussed, we should move to body styling. It's commonly agreed that a supercar must have only two doors, meaning more often than not it will be coupe style bodywork. And all Skyline GT-Rs from R32-series onwards have only two doors to the cockpit.
There seems to be a recurring phrase above there, so I think it's quite safe to say that all Skyline GT-Rs from R32-series onwards are, in fact, supercars.
DE