It's from Marcianopolis - these can be confusing to read because the city name is sprinkled all over the reverse. From 3 to 5 you have MAPKIANOΠO, then in the right field Λ / I / TΩ / N
I'm on the fly and I don't have my references handy, but I don't think it's Gordian. I don't recognize the magistrate on the reverse as belonging to the time of Gordian, but I can't make out the obverse legend. Check coins of Philip and Otacilia or Severus and Julia maybe...
My friend has a handy page giving magistrate names on this period. They come in handy on hard to read coins and telling Caracalla from Elagabalus. http://www.akropoliscoins.com/page8.html Do I see tooling around the letters on the reverse making some read differently? VΠ ΠPACT MECCAΛΛEINOV The obverse clearly reads Philip.