Use the same credentials that you would use to log in to a school computer or Wi-Fi network. Your student ID number should be the user name, and you should know your own password.
You should see the screen below. Click on the big tab that says "about me".
Scroll down to the box that says "official things" and click "profile".
The next page should have a lot of your personal details (including name, address, DOB, graduation year, etc.) on top, but if you scroll down a bit, you should see your unweighted GPA (we DO NOT calculate a weighted GPA) and rank (out of 89 seniors).