Guilmi is a comune and town in the Province of Chieti, in the Abruzzo region of Italy. It is located on a hill Colle San Giovanni nearby the Si…Guilmi is a comune and town in the Province of Chieti, in the Abruzzo region of Italy. It is located on a hill Colle San Giovanni nearby the Sinello valley, from which the skyline of the village clearly sticks out with the profile of the water cistern and the church of Santa Maria Immacolata.