In has been a while since new plugin version 3.0.0 is available in Gradle Plugin Registry
There are actually two of them in one bundle
They is still designed to work with XP 7.x
doc plugins were removed, they were rudimentary
There is essential and most noticeable change in the new app plugin: application jars don’t get application version number appended by default. Now you can bump up your app version and don’t worry that two jar files will appear in deploy folder.
Since version 3.0.0 XP Grade Plugins got their own page in our developer protal master
Full change log can be found on Github