Check out the Javadoc API for the recent 0.11 GA release.
You may also try the SNAPSHOT Javadoc API for the coming 0.12 release.
Version
Javadoc
Groovydoc
1.1 SNAPSHOT
1.1 Javadoc
1.1 Groovydoc
0.12 GA
0.12 Javadoc
0.12 Groovydoc
0.11 GA
0.11 Javadoc
0.11 Groovydoc