我是在加拿大上的学,是读商科(coop)的。 每个学校都会有自己的系统叫Coop. You can find out what the calculation is at yourschool's coop office, on their website or in an email from Admissions. There are a couple of calculators that you can use to calculate it but i found them pretty hard to understand so just asked my advisor (i think she took advantage of her position and used this as an excuse for not being able to answer me :P)
The system works like this: You put down all your courses with credits (the ones where you need C+/B- average, see the grading scale here ) Then there s another screen where you enter any transferred credits you received from other universities(you will probably have to get permission from previous institutions, colleges and high schools to get those transcripts approved by UofT) And then you choose which classes you want to take next year (note: if u know how the grading scales work don t be afraid to ask about it because you would hate finding out too late that your grades don"t count as much as hoped when applying to grad school) At some point they might give you access to the calculator that does the math on the grade earned x amount of course hours taken=your GPA
You do NOT need to worry about "courses transferable between institutions". Your university has already done that part for you; you only need to make sure whatever we say counts towards a particular program! Good Luck!