Google is now a days on the roll with the release of updated apps for iOS 6 and iPhone 5, like stand alone YouTube, Chrome browser, whereas many others are on their way to get release in near future as standalone Maps for iOS 6, Field Trip etc.
Here comes Gmail for iOS, with a minor update with iOS 6 support which is live at App Store and free for iPhone, iPod Touch and iPad.
Download Gmail v1.3.1415 for iPhone and iPod Touch
Download Gmail v1.3.1415 for iPad
Facebook Messenger with iOS 6 Support
YouTube App with iPhone 5 Support
Updated Chrome with iPhone 5 and iOS 6 Support
How to Get Google Maps on iOS 6
iPhone Apps with iOS 6 Support