I visited a prof and he told me he'd be very happy to have me in his group. I think it was b/c that my current advisor made some personal recommendation and my research interest matches his almost perfectly, I understand most of his papers and had a nice talk. However my GPA isn't stellar, it's probably a 3.4-3.5 or 80% from a very good canadian university. My 4th year gpa is pretty high (89%) with two 95+ in Quantum3 and E&M3 with a full course load and 4 of them are 4th year physics courses. How will this affect my chances? Do profs really care about students grades a lot?