Taking over Gitlab site


I have just taken over a site built using Gitlab for my sons high school. I am a volunteer parent and the school wants to me to re-do the site.

I want to be able to see the site as it was but it seems to be off line.

Can someone please lead me in the direction of at least getting the site back up so that I know what I am working with?

I typically use Dreamweaver or Sublime Text for my sites so Gitlab is pretty foreign to me.

Thank you!