Since 1957, Gomery worked at the law firm Fasken, Martineau and Dumoulin in the areas of family law, commercial litigation and bankruptcy and became a partner there in 1966. In 1972, he was appointed Queen's Counsel (QC). In 1982, he was appointed to Quebec Superior Court Montreal district and from 1999 to 2005 served as President of the Copyright Board of Canada (renewed in 2002).