Probably the easiest (if got ownership of gDoc) is to publish Google s/sheet data as RSS Feed and import via XML import with RSS XSL (there are some pre built RSS XSLs out there) . Alternatively Import from URL in FM12 into a field and parse the data. (or web-viewer)
useful example here.
Note: This is inherently insecure with regards the google data feed. Your RSS feed data is publicly readable ( though seems not easily discoverable ). If thats a problem you'd have to look into the Google API with a Plugin (with a lot more effort)