In his spare time, he is a singer-songwriter. His songs are a mix of old Flemish folk music, blues, and the French chanson. He sings his very poetic, melancholic and sometimes "dark" lyrics in Dutch, French and English, and is soon labeled as a "poète maudit", a doomed poet, who always writes about love and death. Geert is fascinated by old ballads about medieval serial killers, like the Flemish folk song The Ballad of Lord Halewyn or the English May Colven. He chooses Gerard the Devil as his stage name, because of an old gruesome folktale about the medieval Devil's Castle where once lived, loved and died... a Lord of Ghent by the name of Gerard the Devil.