It depends on how you add Google Drive documents to Elium:
If you use a massive import on the platform, then there is no synchronization between the two.
When you add a single Google Drive file from the contribution area, there is also no synchronization between the two.
However, if you display a Google Drive folder in the content body, then yes, the documents are synchronized between Elium and Google Drive because the documents remain on Google Drive and are simply "displayed on Elium as folders."