Anything JS can do, GWT can do. It's just that it requires you to write JSNI if nobody did before you and packaged it in a library.
See, http://code.google.com/p/gwt-mobile-webkit/ was doing Web Storage and Geolocation long before they came to GWT proper: http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/storage/client/package-summary.html and http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/geolocation/client/package-summary.html -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/FPRxIqEl1HkJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.