You mention "the GPA" but there are actually several GPAs adcoms can look at.
After you graduate with a degree, any undergrad course taken goes into your post-bacc GPA, which can be looked at together with undergrad GPA (cumulative total undergrad), but typically isn't. It's usually viewed separate from your traditional undergrad. Some schools may differ, but that's how I've typically seen it.
If you reapply for undergrad admissions for a "second bachelor degree" it's still post-bacc to my understanding. Please correct me if I'm wrong.
I'm not sure how things work in Canada higher ed or at your institution. Are you applying to American med schools or Canadian?