@aalmiray GR8Conf talk's video has been published. This talk does not focus on Griffon capabilities to create Desktop apps. Instead it shows how the Griffon project uses other ecosystem pieces (Gradle Asciidoctor, Lazybones ...).
If you have a big multi project infrastructure, please watch this talk. You will learn a lot about Gradle in a multi project build (challenges working with JDK 1.7 and JDK 1.8, how to generate documentation which includes production code and thus stays in sync, jacoco for a root project etc)