can any one help me to find a way to connect my gizduino atmega644 a gps shield to google earth..
What sockets does google earth have to plug the GPS shield into?
You don't connect the shield to google earth. You use the data that you get from the shield in calls to API functions that google earth exposes.
So, what data are you getting from the GPS? What google earth API(s) are you trying to call?