[2] Gill was appointed to the Passaic Alcoholic Beverage Commission in 1968 and eventually served as chairman.
[2][3] In 1987, with Democratic running mate Garfield mayor Thomas J. Duch, Gill defeated Republican candidates Frank B. Calandriello and Andrew E. Bertone for two seats in the New Jersey General Assembly from the 36th district after the two incumbent Republicans chose not to run for reelection.
In 1990, Gill cast one of the final votes in favor of Governor James Florio's unpopular income tax increases.
[3][5] During his time in the Assembly, Gill continued to be re-elected to his Passaic city council seat.
Following his defeat from the Assembly, he continued to serve on the Passaic council until he lost his seat there in 1995.