Gérard has written a French translation of Emperor Julian's "Against the Galilaeans", published in 1995. Gérard lays out his approach to faith and ethics in the books "Parcours païen" (2000) and "La Source pérenne" (2007). He has also written multiple novels in which his religious views are reflected. His debut novel from 2003, "Le Songe d’Empédocle", is set in Belgium, Delphi, Rome and India, and concerns a man, loosely based on Gérard himself, who discovers a secret society which has kept paganism alive in Europe. In 2009, he was awarded the Prix Félix Denayer from the ARLLFB for the book "Aux Armes de Bruxelles". The book is about the city of Brussels, with a focus on cafés and tea houses, but also on architecture, parks and culture. The jury wrote that it was surprised by this departure from Gérard's usual style and subjects, but that the prize was "as much for one particular work as for all of them together".