I’m on a Chromebook (Acer R11) and it IS school administrated. I talked with other people and they don’t seem to have trouble accessing this page. Am I just being dumb?
I’m not sure this is an actual issue, but here are a couple of things you could try:
Install (or ask an admin to do it for you) an alternative browser, e.g. Firefox. Then you can compare if it’s a browser-specific issue.
Use the Chrome developer tools to see if there any errors pop up in the developer console or if there is any content being blocked when you browse the GitLab site.