How do I set up a Google search icon on my IPad?

Not entirely clear what you are trying to do, but a couple of suggestions:

• In Safari, the address bar also serves as the search bar. You can set Google as teh default search engine in Settings (Settings App > Safari > Search Engine)
• You can add a web page short cut to the Home screen (as an icon): Open Safari and go to Google. Tap the send iocon (square with an arrow, just tot he left of the adress bar), select Add to Home Screen.
• Download Googles app from the app store.

Download from App Store

https://itunes.apple.com/sg/app/google-search/id284815942?mt=8