If you've PGWP, then you should've gotten a work permit visa which is issued together when you're approved. Were you outside Canada when your PGWP application was approved? I advise you inquire from the Canadian embassy at your place if you'll need a work permit visa for entry or if it can be issued at the POE. Your study visa/TRV is valid for study permit. I'm not sure if it's applicable to PGWP holders.
I had applied for my PGWP from within Canada. And need to apply for my TRV. That is why I was concerned that do I need to again apply for my PGWP TRV if my Study TRV is still valid?