[1] He was an able warrior and politician and supported his elder brother John I, Duke of Brabant in all his undertakings.
He fought alongside his brother in the Battle of Worringen in 1288, where he captured Reginald I, Count of Guelders.
Godfrey of Brabant donated the land for new city fortifications to the inhabitants of Aarschot.
After the death of his brother, he supported his nephew John II of Brabant against all internal and external opposition.
In 1302, when Flanders revolted against King Philip IV of France, Godfrey and his only son joined the army of his French ally in the Battle of the Golden Spurs.