Silverstripe module that provides functionality to search for a location (locations entered in the cms) based on zipcode.

extract to a folder named google-store-finder in the root of your web host.

Code is based on google's sample geolocation and location lookup code, retrofitted into silverstripe structure.
https://developers.google.com/maps/articles/phpsqlsearch_v3
https://developers.google.com/maps/documentation/javascript/examples/map-geolocation

For Developers, here is the google maps api:
https://developers.google.com/maps/documentation/javascript/reference