The offical Gmail blog announced Gmail for iOS now has notification support and persistent logins.
“Gmail is now fully integrated with Notification Center and supports banners, alerts and lock screen options. Plus, notifications are now incredibly fast — up to 5x faster than in the previous version. You now have the option to send mail from alternate email addresses. If you have configured alternate sender addresses in Gmail on your desktop under Settings->Accounts->Send mail as you will see a From: option when composing new messages in the app. The login process to allow you to stay logged into the app for as long as you’d like.”
