The way that Google Map integration works in QlikView is that the background image of a scatter chart is set to the URL of a Google map. You can add other bits to that URL, to get the map to behave in certain ways.
You will need to look at the Google Maps API documentation to find out how to do push pins.
The URL can be found in the Dynamic Image expression box on the Colors tab of the scatter chart properties.
The only functionality you will be able to get in QlikView is a static image, so having hover information on the push pin is not going to be possible (in fact, I have never tried a push pin - so this may not be possible either).
Hope that helps.
Steve
