Each stack in SilverStripe is created with a Gitlab project which you can access using your SilverStripe Platform log in: https://code.platform.silverstripe.com/
For instructions on pushing your projects to Gitlab please see the development guide.
For further detailed instructions on how to use Gitlab please see the Gitlab user documentation: http://doc.gitlab.com/ce/
Each user role can have access to Gitlab. At the moment, SilverStripe Platform users on your stack need to be added manually to Gitlab. Stack Managers can use the “Settings > Members” view in their Gitlab project. Select “New project member”, search for users by name and add them with a “Developer” project access.
We’re currently restricting access to Gitlab using an IP whitelist. To request access please submit a Helpdesk ticket asking to be added to the whitelist and include your external IP address.