I'm not sure how your current institution grades, but this might help you to convert: http://www.foreigncredits.com/Resources/GPA-Calculator/
Also some stuff from Queens on their GPA here - http://www.queensu.ca/artsci/students-at-queens/gpa-calculators
Grading scales at Canadian schools can vary a lot, I've never understood why it can't be more consistent everywhere.
I'm surprised no one has chimed in yet! I don't really have advice that will carry much weight, but have you considered trying to defer your acceptance(s) by saying you have some kind of work/research opportunity? Each school has its own policies around this, but it's worth looking into.
I applied to only one school (Waterloo engineering) and it was due on Feb 1st. I feel lucky that I haven't been freaking out as long as everyone who had due dates as far back as December, however I'm really jealous of people who are already finding out! Good luck everyone