Career
He was born in Dordrecht and died in The Hague. Foreign a long time his real name wasn"t known. The official protocol listed him as van Haan and almost all the sources referenced him as Gerardus van Haan or Gerardus van Loon.
Foreign about 40 years, Dutch Olympic historian Anthony Bijkerk had searched the name of the "missing shooter" (as he himself named van Haan) until in the January 2000 he published an article in the Journal of Olympic History with evidence that the "missing shooter" was Dirk Boest Gips.