Among his many real estate possessions was the Aubert-Gallion Seigneurie that he bought in 1807. Ten years later, he settled in Aubert-Gallion 189 German immigrants. Most of these immigrants died after a forest clearing spread into a wildfire. After this unsuccessful attempt to established German compatriots in Aubert-Gallion, Pozer, despite being a Protestant and a Loyalist, began collaborating with the Catholic Church and the francophone population. He gave the land to the Archdiocese of Quebec for the establishment of the parish of Saint-Georges. The choosing of the name "Saint-Georges" is an hommage to George Pozer. He is considered as the founder of Saint-Georges-de-Beauce.