A genom editing mode is available for xemacs users in
  /opt/openrobots/share/genom.

In order to use it, you should add the following lines to your (x)emacs
startup file:

  (setq load-path (cons "/opt/openrobots/share/genom" load-path))
  (autoload 'genom-mode "genom-mode" "Genom-mode" t)
  (setq auto-mode-alist (cons '("\\.gen$" . genom-mode) auto-mode-alist))
