Trêve de Dieu
In addition to his role in the Investiture Controversy, Gerard was a voice in the implementation of the Peace and Truce of God movement to limit warfare. At Douai in 1024 he introduced the Peace into Flanders at the urging of Count Baldwin IV, he himself apparently having reservations. In 1025 he criticised Reginard, recently appointed as bishop of Liège, for simply releasing suspected heretics after they had made an orthodox declaration of faith, and for allowing somebody excommunicated in Cambrai to be buried in consecrated ground in Liège.