If this is any consolation OP, I worked in Toronto this summer and had several colleagues doing degrees out of province! It's definitely possible to come back to Ontario to get a job, and considering the adjustments that have been made this year due to COVID and all interviews being conducted remotely, I think asking firms for an accommodation to do remote interviews because you're not able to come home is actually a possibility in the future.
GPA's were posted and then removed for everyone I believe. Schools have your transcript so I don't think it's necessary for your GPA to be posted in order to be considered but idk for sure. Some schools calculate their own GPA's anyways.