Congratulations to your admission. I am applying for Rotman now but I saw it has a GPA guideline(at least 85% in the final year), unfornately, I just have 82% in my GPA.
You need to contact with admission offfers in Rotman directly. As I know, Rotman has very strict( or you can say stiff) requirement of GPA, it is also impossible to get into Rotman with low GPA.