Gitlab Pages on on Sub-URL

I read about the release of Gitlab 8.17 finally having the Gitlab Pages available in the community edition. Now during the preparation of the update to 8.17 I though about how to realize this on my installation.

The main problem is that I am not able to get a wildcard subdomain for my Gitlab instance, due to policies of my company and the DNS service provider. So my idea is the following to have the Gitlab instance running on and host the pages at (of course not having a user or group called pages). In this way I do not get in trouble with the DNS records and our policies and on the other hand I am able to use the same CA/TLS certificates for the pages.

Is there a way to configure Gitlab >= 8.17 in this way?