Grades that you see in Canvas are not final grades. Final grades, which are used to calculate your GPA, are posted on Banweb.
It’s really important that you check your final grades at the end of every semester because final grades are not always the same as what you see in Canvas. Many times your final grade in Banweb will match what you see in Canvas, but not always. Some instructors will adjust the grading scale down (or up!), sometimes a mistake is made, and in certain situations the instructor may give you a temporary grade (P, I, or X grade), which means you have limited time to complete something before receiving a final grade. All of this is important to know so that you can follow up promptly with your instructor if you have questions.
You can see your final grades by logging into Banweb. Go to the Students tab, then Student Records, and then Final Grades or Academic Transcript (unofficial). Either place will give you access to your final recorded course grades that are used to calculate your GPA. If you see something that you don’t understand then check out the definition of the grade codes in the Undergraduate Catalog under Grade Policies.