Google TV has released an official remote app for iOS, making it applicable for the iPhone, iPad, and iPod Touch. This comes after the app debuted for Android devices in December.
The interface and features of the iOS app is almost similar to its Android counterpart including voice search, except that the current iOS version does not support sharing web pages from mobile to the TV screen.
The Google TV app for iOS is free on iTunes and can also be download via the QR code of its official blog.
Source: Google TV blog