What are the options for showing Google Drive files in Plone?
(Usecase: Students 'publish their docs' on google drive, Plone shows them (in 'folder' 'Student Work')
XML Director for Plone has native support for Dropbox. A driver for Google drive is projected but requires a funding in the range of 3000 to 4000'EUR. Or you use XML Director over SaaS providers Otixo or StorageMadeEasy (Privacy!)). Going through XML Director is the canonical solution since the solutin is pluggable and transparent.
See also my "builing bridges" talk from the last Plone conference.
-aj