I have been having problems with the GMaven stub generation in 1.3. Apparently it doesn't like multi-line strings in annotations and nested arrays in annotations. GMaven 1.0 still works great, but I am ready to retire GMaven all together. Looking for alternatives, I found two Ant plugin integration and using the Groovy Eclipse Compiler.
Ant integration is documented here:
http://docs.codehaus.org/display/GROOVY/Compiling+With+Maven2
You can updated the versions, and it will run smooth, but I prefer a more integrated approach that looks promising:
In a previous blog, I discussed how my local maven repository was causing me a lot of grief because it was getting large and slowing down my network log in:
http://www.scottmurphy.info/how-change-local-maven-repository-or-intelli...
Being a Groovy/Gradle Enthusiast, I would also like to do the same thing for the location of Groovy Grapes (@Grab) and Gradle's cache directory.