Dr. Moses Gunn graduated from Yale in 1748 and served as a Physician. No information has been found regarding Dr. Gunn's medical practice, but numerous accounts of Dr. Gunn being an ardent Whig and supporter of the democratic constitution have been found.

Moses appears as Representative from Montague at the General Court from 1774 to 1857 when Montague became a part of the 6th District. He also appears as the Town Clerk for the period 1761-1782; as a Selectmen of Montague for the years 1761-62,65,67,69,71,74-79 and 82-84; and as a Moderator of Montague's March Meeting for 1779. And, in a book written about the Town Montague, Moses is listed in the Town Hall of Fame as follows: "Dr. Moses Gunn, patriot, eloquent, wise counsellor, was in every movement in the state for saving the democratic constitution of the towns, during the period of the Revolution."

Moses served twice during the Revolution. Both times during 1780. A record of this service is available on this page under "Gunn's in the Revolutionary War".

The following is transcribed from the book "The History of Montague, MA.":

page 122-124

Two English regiments in the fall of 1768 were sent to Boston to enforce the Townshend act. Boston braced herself for resistance. All the towns of Massachusetts were invited to meet her at Fanueil Hall. On Wednesday, September 21, 1768, the people of Montague promptly assembled at their meetinghouse and chose Dr. Moses Gunn to represent the town at this proposed convention. Dr. Gunn was our Samuel Adams, our spokesman throughout the Revolution, a man with eloquent command of the English language and tireless self-sacrificing zeal for democratic administration of our institutions. In August 1772, a severe blow was struck at Massachusetts in a more direct way. There came an imperial order that henceforth all judges should be paid by the crown. Samuel Adams came forward with a scheme to meet this new device of oppression, a plan of agitation by letter, a sort of round robin parliament to reach every intelligent man in the Province, and constitute the whole population a perpetual Provincial Congress. April 6, 1773, there was a town meeting in Montague to hear about the plan. It was voted to choose as a Committee of Correspondence, Moses Gunn, Moses Harvey, Elisha Allis, Stephen Tuttle, Peter Bishop, Judah Wright and Nathaniel Gunn, Jr.