"Gelsa es una localidad y municipio español de la Ribera Baja del Ebro, provincia de Zaragoza, Aragón.Tiene una población de 1 122 habitantes (INE 2014)."
"Gelsa is a municipality located in the province of Zaragoza, comarca (county) of Ribera Baja del Ebro, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 1,216 inhabitants."