LockBuilder has the ability to export themes directly to GroovyLock. Think of it as a GroovyLock maker. To export a theme to GroovyLock simply press the System icon then Export GroovyLock enter a name and let it do it's magic. After it is finished you will have a complete GL theme with Config.js

You will have to have the GroovyLock addon to be able to do this. Which will be .99 cents in cydia. I would release it at the time LockBuilder for iOS8 is ready, but I am waiting on a GroovyLock update.