Doesn't look like they are, to me. Their main domain's IP address is owned by Microsoft (so, using Azure?), but the status page IP is in a block owned by Digital Ocean.

Edit: I could have sworn I refreshed the page before replying to make sure someone else hadn't already responded, and I didn't see your comment jschulenklopper. Scary how similar they are lol.

It is, in general. But I've seen no indication that such is the case for Gitlab.

Au contraire, status.gitlab.com seems to be located in NYC (in a Digital Ocean DC), and www.gitlab.com somewhere in Virginia (at Microsoft Azure?).