The Google Search app has been recently updated on App Store with the integration of new search function according to your position: Google Now. View weather forecasts and traffic conditions based on your position or news "of your favorite sports teams" and the last minute news.
Note: You can see that the location function does not turn off automatically when you leave the application.
I remind you that there is a tweaks available on Cydia for quick search with Google Search from anywhere on your iDevice , called NowNow ,This tweak will allow you to search with voice function of the Google Search application with Activator from anywhere on your iDevice gesture.
The update is now found on the App Store for iPhone and iPad.