introduction
GCS Data is managed using the Dashboard UI under Content Management module.
Once a GCS service is deployed, the module picks up its presence and displays an entry on its page. Head to Content Management page and click on the name of the GCS service.
The module will load the schema of the GCS as you configured it in Content Builder, it will render it and display the UI interface with the allowed functionality accordingly.
Once you are done generating the schema with the content builder, and after you edit your package acl, you will see a custom UI module under the Operate/wiki/spaces/BL/pages/61906563 pillar in the dashboard.
You will also notice that if you configure a GCS to have its data stored in multiple Environments, then Content Management will display the data of that service based on these configured environments so you know the location of the data you are modifying.