Google’s popular search app on iOS is now updated with iOS 7 esthetics, added the new iOS 7 keyboard. The start screen is now full screen omitting signal & battery bar.

Apart from this there is no major improvements.
Bringing the app version to V3.2 , official change log from App Store:

iOS 7 styling and true full screen browsing
Fast, fluid image search for iPad
Smarter integration with the Google Maps app

The full screen browsing is a good change, app now has smarter integration with google maps

You can download the free app from App Store from here