Gunhild was the daughter of Mieczislav I of Poland and Dobravy de Bohême. The date and place of her birth have not been found.
Her husband was Svend I Otto Haraldsson, who she married in ABT 0990. The place has not been found. Their four known children were Harald II (c0994-1018), Gytha (?-?), Gunhilda (?-?) and Thyra (c0993-?).