Vaadin + VisualDesigner + Grails

I am a newbie with vaadin. I am using Grails with eclipse, Groovy Grails Tools Suite, and I wanna use the Visual Designer with this eclipse version, GGTS.

I installed the vaadin plugin for grails, without problem but I dont know if I can use visual designer.

Nobody here has used this combination , Vaadin VisualDesigner + Grails?

Any help or any cluees , please advice me.