Accessing Old High School Google Account After Switch to Outlook?

I need help accessing my old high school Google account. During high school, I used a Google account provided by the school to store all my work on Google Drive. I had always been logged into that account on my PC until last month when I accidentally logged out by clearing my browser history.

Today, I tried to log back into that account to revisit my old projects and memories, but my high school now uses Outlook instead of Google. When I attempt to log in, I'm redirected to Outlook, where my Google username isn't recognized.

Is there any way for me to access my old files on Google Drive?