http://code.google.com/apis/ajax/documentation/

The module name of an API is also its namespace. So symbols from the "maps" module are available under the namespace google.maps when the module loads. Existing Google AJAX APIs like the Maps API use a G prefix for all exported classes and constants. With this new naming convention, class names no longer have the G prefix, e.g., GMap2 becomes google.maps.Map2. APIs that currently use the G prefix will continue to support both the new and old naming conventions. Future APIs will only be available with the google.moduleName namespace.
l'unica cosa che mi viene in mente .