Execute maven-plugin from gradle

I’ve seen this question asked multiple times, but the answer has been “It is planned to be supported in Gradle” (3 years ago) to “It’s not supported, use ant and exec instead” (1 year ago).

Is it still not possible to invoke a maven-plugin directly from Gradle, without the hassle of setting up a maven environment and using Exec?

The reason I ask, is the need for generating some sources for a GWT project (specifically invoking the org.codehaus.mojo:gwt-maven-plugin with the generateAsync goal.

It seems a bit of a short-coming of gradle, since there are so many maven-plugins out there, that actually do make life easier for devs. To have to re-code them all into gradle seems sort of a show-stopper.