In a historic opinion on November 18, 2003, GLAD won a ruling from the Massachusetts Supreme Judicial Court that gay and lesbian couples can no longer be excluded from civil marriage rights in Massachusetts. GLAD filed the case in April 2001. The 4-3 opinion was the first of its kind in this country by a final appellate court.
https://www.glad.org/cases/goodridge-et-al-v-dept-public-health/