can we combine both GWT and vaadin code in same portlet

I have a piece of code in gwt and am feeling it tough to implement same in vaadin. Am deploying all portlets in Liferay. So in a portlet i have rest of code in vaadin.

So can i combine both GWT nd Vaadin code in a same portlet

Thanks a lot in Advance

Yes, just package the GWT code as Vaadin component. See
Book of Vaadin on how to do this