Hi! In terms of how ORPAS calculates the cGPA/sGPA for Ontario schools, I am definitely on the lower end of the scale, too. According to ORPAS, my sGPA was 3.69 and my cGPA was 3.71. I went on exchange in my third year, and the grades I earned abroad were not counted in the calculations (they used grades from my second year to replace these).
Surprisingly I have been waitlisted at Western and accepted at UBC! Of course, UBC's prerequisites are completely different from Ontario schools, and I expect that my GPA was higher with their method of calculation. However, asides from your GPA, I think having a lot of experience is crucial. I have 100+ hours of experience working with SLPs in two different specializations, I work as an RA for a professor who does SLP research, I volunteer as an RA in a linguistics lab, I have 100+ hours of volunteer experience in related fields, etc., etc.
My point is, GPA isn't everything!