- Married: Abt 836
- Died: Unknown
The Genealogica Arnulfi Comitis names (in order) "Karolum et Gislam" children of "Hludovicus ymperator…ex Iudith ymperatrice". Her marriage is deduced from a charter in which Gisela states that their eldest son Unruoch brought back the body of Eberhard from Italy.
She founded the abbey of St Calixtus at Cysoing, Flanders, where she lived as a widow. "Gisle" granted "le fisc de Somain en Ostrevant" to "filii…Adelarde" by charter dated 14 Apr 869, which names "rex Karolus meus…germanus…senioris mei dulcis memorie Evrardi…tres infantes meos Rodulfum…et Berengarium…et…Adelarde". The Historia Ecclesić Cisoniensis records that "Gisla" donated property to Cysoing abbey for her burial next to "coniugis mei dulcis memorić Evrardi", by charter dated 2 Apr 870 which names "filić meć Ingiltrudis…filius meus Rodulfus", and by charter dated "Kal Jul anno XXXV regnante Carolo Rege", naming "filii mei Unroch…filiorum meorum Adalardo atque Rodulfo" and signed by "Odelrici Comitis". "Gisle" donated property to Cysoing for the anniversaries of "Ludovico imperatore patre meo et…Judith imperatrice matre mea et…rege Karolo…germano et…prole mea…Hengeltrude, Hunroc, Berengario, Adelardo, Rodulpho, Hellwich, Gilla, Judith" by charter dated to . 1
Gisela married Eberhard UNRUOCHINGI, Duke of the March of Friulia, son of Cte Unruoch EN TERNOIS and Engeltrude, about 836. (Eberhard UNRUOCHINGI was born between 805 and 810 in Friuli, Italy, died on 16 Dec 866 and was buried in Abbey of St. Calixtus, Cysoing, Nord, France.)