How Do I Lock My Google Drive App (or files) on iPad? How to lock my Google Drive app (or just one file on it) on my iPad so no one can view it if they find my iPad?
It seems that the Google Drive iOS app doesn't have this feature.

There are alternatives that do implement a password lock, like GDrive. However, its user experience seems to be overall less pretty than Google's own app.

As a marginally related side note, Dropbox iOS app does implement a password lock.