This is the source code for the free Open Source Weceem Content Management System built on Grails.
The code uses the Weceem plugin to provide the CMS functionality, and the Weceem Spring Security plugin to add user authentication.
This application code itself adds little more than the user administration interface.
You can build this application to produce a ready-to-use WAR file of the CMS.
Full documentation is on the Weceem site