Great piece! I really enjoyed it. But being Greek and having lived almost my whole life in Athens I can asure you that Gyros is definitely a food that is eaten in Greece. I don’t know its exact origins and where it was invented- most Mediterranean countries have similar cuisines anyway- but you can find a gyros place in every corner and it is the kind of food that every Greek person has at least twice a week.
Mousaka and skordalia are also very traditional, it is the kind of food that kids hate but mothers boast about cooking better that anyone else. That said, I’m sure that Greek Americans have a much more traditional and unrealistic impression of what Greek food looks like, just like they have for the whole country, if I judge from the paintings they hung in Greek restaurants around the world.