Hi
I think core developers plan to base jme projects template on gradle. They released the first version of Bootmonkey yesterday Release Bootmonkey 1.0.0 · Nehon/bootmonkey · GitHub
you can read more about it here
You can run it on any IDE. Beside it you can use SDK for managing models, creating scene and more.
I myself installed Gradle plugin on JME SDK (which is based on netbeans) and using both gradle and SDK features.