The assault was prevented by the arrival of reinforcements form Louis’ son-in-law Godfrey III, Count of Louvain, and a truce was concluded.
Gerard and his mother went to emperor Frederick Barbarossa in Aachen to obtain compensation, but the citizenry of Sint-Truiden successfully defended their claim.
Gerard moved his court to Kuringen, near the Belgian city of Hasselt located in the Flemish Region in the province of Limburg, and in 1182, he founded the Abbey of Herkenrode, entrusted to the Cistercian Order.
Gérard and Adelaide had at least eight children: Gérard I is a wrongly proposed Count of Loon (Dutch), or Looz (French), who was supposedly mentioned in an 1101 charter of Emperor Henry IV concerning the return of the town of Andenne by Albert III, Count of Namur.
The charter, or at least one modern version of it (old manuscripts do not use modern commas), mentions a list of people including "Gerardus Comes de Looz, Arnoldus et frater ejus Theodoricus, Gislebertus filius Comitis Ottonis, Comitis de Duras" meaning Gerard is specifically a count of Looz or Loon, whereas Arnold, mentioned next (with his known relatives Theoderic, Gislebert, and Otto) would have been expected from other records.
It was pointed out by J. Daris in 1867 that there was another copy of the charter of 1101 which called Gérard simply a count, and Arnold was the one described as "Comes de Looz".