Call it a long time in the making, but push notifications are finally being offered on the Google Mobile App for the iPhone – something that's surely wanted by many users. We're confident that there have been plenty of instances when you've probably missed out on some event because it totally flew under the radar, but thankfully, notifications will alert you so you're always in tune with your schedule. Not only will it show you on-screen that you've received new mail in Gmail, but it'll even display Google Calendar reminders and even packs new code which essentially provides for quicker answers when you're searching stuff – like flight info, weather, stock quotes, and currency conversion. It's finally available here, so make sure to download the update through the App Store.
source: Google Mobile Blog