The Vaadin 7 plugin integrates the Vaadin Framework into Grails in an easy way.
Add the repo to your build.gradle
file.
maven { url "https://dl.bintray.com/vaadin-for-grails/plugins" }
Then, add the plugin dependency to your build script.
compile 'org.grails.plugins:vaadin7:3.+'
Finally execute the grails command grails vaadin-quickstart com.yourcompany
and run your app.