When you check the Software/Update tab of JBoss Central, at the end of each item you see Tested, Experimental or other.
Those are links that lead here:
https://devstudio.jboss.com/updates/7.0-development/central/
(A side question: Will this be updated to 7.1 just before GA? Or shall I create a JIRA for that?)

Aside from the fact that the links act up on mac - the page is opened in the background - I have a problem with the wording of Tested on that page:

These plug-ins are hosted by Red Hat and tested by Red Hat, but support is most likely provided by another vendor. Red Hat attempts to report issues to providers as required, should any arise.

This is certainly not true for GWT plugins - AFAIK we don't host those.