Google earth is a pc program. Get your app for the iPad from the app store. There is not an actual "google earth" app that I know of, but some pretty good replacements....
Actually there is google earth for the iPhone. It will not be as pretty, but it will work. I am sure there is one for the iPad in the works.
Just do a search for google earth in the app store, it's free. When you run it be sure to tap the little "2X" button, that will make it bigger for your iPad.....
I just played with it. It's a blast using the pinch, expand, tap .... Etc on the screen