Gmail for iOS gets update so it can work better with other Google apps
Another new feature that comes with the update now allows you to sign out of Gmail accounts individually. Gmail for iOS allows for 5 separate accounts that you can easily switch between. Before the update, ending the session on one account would automatically sign you off all of your other open accounts, a feature that thankfully has been removed.
The Gmail app for the Apple iPhone and Apple iPad is a free download from iTunes.
source: Gmail via Phonescoop