Is there a way to manage Google Calendar sharing through Zend Gdata or otherwise in PHP?

I'm creating a custom calendar app that is using Google Calendar as a base. I am wondering if there is a way through the Zend Gdata library to manage calendar sharing. From the documentation it does not appear so, but I noticed that some other languages have the ability (.Net, Python). If it's not possible through Gdata, is there another library out there t开发者_如何转开发hat provides the ability in PHP?

The Zend Framework Gdata seems to be based off the version 1 of the API. Version 2 is now out, and uses XML or JSON to communicate, so should be relatively easy to implement. See http://code.google.com/apis/calendar/data/2.0/developers_guide_protocol.html#SharingACalendar for implementation instructions.