Server and Clients for Emacs
This package is not required for XEmacs, because the tools included
here are a part of the XEmacs package.
With these tools, an already running Emacs can be accessed externally,
for example, in order to edit a file or run a code in Emacs Lisp. This
way, there is no need to start a new Emacs each time another
application loads an editor.
Find hints at /usr/share/doc/packages/gnuserv/README.SUSE.
There is no official package available for openSUSE Leap 15.4