If you go to the EE subsystem in the console and try and add a global module the list that pops up is limited to the modules that are provided by the as (i.e. only org.jboss.as.* modules). As the primary use case for this feature is to allow users to create their own system wide libraries, this is not very useful (there should never be any need to add an org.jboss.as module as a global module).