So I started working with the Google Data API, and I noticed when you click on code samples and references it just sends to directly to Zend Framework. They have created Zend GData which gives you read / write access to the Google Data API's.
It is a very nice set of PHP classes that allow you to work with Calendar, Spreadsheets, Blogger, CodeSearch, and Base.
It saved me a lot of time and energy and gave me nice set of tools to get my systems integrated with Google right away.