The linked thread actually does have a couple, albiet tenuous, mentions of GPS:

  - "All of our Citizen swiss lathes have the same GPS feature." (http://www.practicalmachinist.com/vb/dmg-mori-gildemeister-maho-cnc/mori-ellison-gyroscope-unlocking-273841/#post2141101)  
  - "Why can't they simply check for "Out of USA" or "in $BannedCountry now"? They do have GPS, right?" (http://www.practicalmachinist.com/vb/dmg-mori-gildemeister-maho-cnc/mori-ellison-gyroscope-unlocking-273841/#post2141382)