Gitlab change project visibility from private to internal
Apparently there is no clicable option in the GITlab portal to change the project visibility from private to internal or to public once that is set at the time of creation. In order to do this, you will have to add "/edit" string to the end of your repo URL and it will show the setting page. The "Permissions" section can be expanded to change the visibility and click "Save Changes" to get your changes reflected. Hope this helps.