[4][5] Gilson handled significant matters in federal court and before the Trademark Trial and Appeal Board.
[12] Matthew Bender & Co. began publishing Gilson's regularly updated treatise Trade-Mark Protection and Practice in 1974.
[14] Gilson received two lifetime achievement awards, one from Managing Intellectual Property magazine in 2008[15] and the other from World Trademark Review in 2011.
[16] In 2003, Gilson was ranked one of the top five U.S. trademark practitioners in Euromoney magazine's Best of the Best Expert Guide, receiving the most votes nationwide.
[18] In 2001, the International Trademark Association bestowed on Gilson the President's Award for Dedicated and Distinguished Service.
"[20] In 1998, Gilson was named the top trademark practitioner in the world by Managing Intellectual Property magazine, based on an international survey of attorneys.