You can get a list of the Google Documents for a particular user by using
the getDocumentListFeed() method of the docs
service. The service will return a
Zend_Gdata_Docs_DocumentListFeed object
containing a list of documents associated with the authenticated
user.
<?php
$service = Zend_Gdata_Docs::AUTH_SERVICE_NAME;
$client = Zend_Gdata_ClientLogin::getHttpClient($user, $pass, $service);
$docs = new Zend_Gdata_Docs($client);
$feed = $docs->getDocumentListFeed();
The resulting Zend_Gdata_Docs_DocumentListFeed object
represents the response from the server. This feed contains a list of
Zend_Gdata_Docs_DocumentListEntry objects
($feed->entries), each of which represents a single
Google Document.