Working often with GWT beginners I found out that the documentation page at http://www.gwtproject.org offers no good structure. The first thing is that you find a lot of old docs which are not up-to-date anymore.
Actually GWT documentation just need to take a look at Spring Framework documentation which has a great doc, also for beginners. This is an example of Spring Boot doc: http://projects.spring.io/spring-boot
The look&feel of the pages is very nice but the contents and structures need a rework.
Customer support service by UserEcho