- Download Apache Tomcat.
- Save anywhere.
- Open terminal and navigate to tomcat /bin folder.
- type chmod 700 *.sh to add executable permissions.
- Modify user rights in tomcat-users.xml
- startup tomcat via /bin/startup.sh
- Open localhost:8080 in firefox
- Open Manager App
- upload .WAR file of your GWT app
- deploy
- visit app via localhost:8080/<gwt-app-name>
11 steps which took me a whole day to find. What. the. eff.