Side note: We are currently using 3.3.3.CR1. I just a few minutes ago moved to 3.3.3.Final; we will try to reproduce this problem there. Again, this is a Google Maps bug, not a RF bug, but it would force us to use another version of the Google Maps...
unfortunatelly Gmap script was not updated till release. And the next time it will be updated only for 4.x. So seems you have to switch to just external Gmap widget usage or to patch the component on your own as described at http://community.jboss.org/wiki/ContributingpatchtoRichFacesproject