Ganohora is not a single village, it's an area and there are more than 15 villages, with the biggest one being Ganos and the second biggest Hora. Do you from which village are your relatives? My great grandfather was from one of them, and I have many information regarding this one.
You should know that after 1922 all Greeks who lived there moved to Greece at a population exchange. Most of them went to northern Greece. There is even a village called Ganohora near Katerini.