Please refer to the Course Equivalency System to search for and view a list of university-level math, science, and other courses that may qualify you for McGill credit and/or exemption.
If you have taken university-level courses that do not currently appear in the equivalency database you may still qualify for transfer credit. Through the above link you can also submit requests for potential equivalencies not already listed, or request a reassessment of expired equivalencies.
For a university-level course to be eligible for transfer credit consideration, it must have been completed with a grade (result) that is equal to or higher than the grade/CGPA required to graduate from that university.
Additional faculty-specific requirements (such as limitations on the credits granted for on-line courses) can be found on the faculty pages.