Sorry, I looked into it when I was in Canada 3 years ago. With current Canadian regs you can forget about the idea of importing a GT-R. The only cars permissable into Canada for road compliance (obviously besides the ones that the Canadian dealers sell there directly) are antiques (15 years old or more) and those cars that were originally sold by dealers in the US. So even if you went to the trouble of getting a complianced GT-R from Motorex you still wouldn't be able to get it complianced for Canadian roads. Then again, if the regs have changed, you could be lucky.
Now, if you want it just for circuit or drag, its a different story. Basically, your chances are good.
Cya O!