PIB treats all kinds of external data the same once it's downloaded to make your work as a developer easier. This includes data hosted S3, from Kitchen Sink, or even from Google Docs.
The first thing to do is register your data source. This will differ slightly depending on the source.
Registering Google Docs (Archie & Spreadsheet)
Before registering, create a new Google Doc in this folder. You should also create a folder for your project and place any docs in there. The docs will automatically be shared with the whole team.
If you're unable to save the doc in our shared folder, make sure to share it with the team's service account the same way you would share a doc with any other Google user (you can read more about Google Service Accounts here):