Installed Attila Kelemen's Gradle plugin in NetBeans IDE 7.3 Beta today:

http://plugins.netbeans.org/plugin/44510/gradle-support

Not only can existing Gradle projects now be opened, i.e., any folder with a build.gradle file:

...but single Gradle projects as well as multi module Gradle projects can be created:

What you see below is the result of using the "Gradle Root Project" template once, followed by the "Gradle Subproject" twice within the folder where the root project was created:

Pretty cool stuff. Where's the documentation for the plugin? Here:

https://github.com/kelemen/netbeans-gradle-project

Read it, some handy tips and tricks are provided there.