Users can now save attachments from messages directly to Google Drive, rather than being forced to download them to their device. The same functionality also works in reverse, allowing Drive files to be inserted into new messages.
In addition, the update adds account management options to help de-clutter the user interface. Users can choose which of their Gmail accounts to show without removing accounts used by other Google apps on the same device.
Finally, users can now change their Gmail profile picture in the app's settings pane.
Gmail version 3.14159 (pi) is available now as a free, 9.3-megabyte download from the App Store.