While I was looking for a desktop integration for google chrome i found the following to articles:
http://www.brighthub.com/computing/linux/articles/36842.aspx which describes how to use alltray and prism to integrate google tasks with you gnome panel.
and
http://www.makeuseof.com/tag/5-ways-to-access-your-google-tasks/ which describe how to use chrome’s feature to create a desktop shortcut to a web-application.
if you combine them both u can use [...]