The help-gnu-emacs is only illustrative: may be replaced with the name
of any of the GNU mailing lists. May be tested by:
G w emacs-help RET <unique string> RET

Further work could involve gnus-summary-refer-thread working with a new
'gnus-search-web' for the related messages of a search result. Also,
with customization, as a search and gnus-refer-article-method for users
of public-inbox (public-inbox.org).

Regards,
James