I use GDFS and experience minor issues with data that is stored there (even available offline).
One is that path completiong using tab when inputing a file path doesn't work the first time you hit tab (nothing happens), the second time you hit tab you get a tab, and the 3rd time you hit tab you get the actual completion options.
Another is that packages that work with the file system (such as fs) will return nothing the first time functions like fs::dir_ls() try to list the contents of a directory. The second time they are run they work correctly.
I realize this is probably much more a google issue to fix than RStudio, but the odds of that happening are zero so any fixes on the RStudio / package side would be great.