Cris Holdorph's Google AJAX API-using JSR-168 portlet ships with uPortal as of uPortal 2.6.0 in place of a prior GooglePortlet.war that relied on a web services API no longer supported by Google.
The shipping configuration works for a uPortal at localhost:8080/uPortal, the typical default developer configuration. That won't work for you in production. If you want to use this portlet in production, you'll need to acquire a Google API key and provision the portlet with this key.