In Goodridge v. Department of Public Health, it successfully argued before the Massachusetts Supreme Judicial Court that to restrict marriage to heterosexual couples was a violation of the state constitution.
[18] On November 18, 2008, the fifth anniversary of Goodridge, GLAD, working with other statewide groups, launched a project called the "Six by Twelve" campaign that aimed to bring same-sex marriage to all six New England states by 2012.
After this decision by the voters, along with a coalition of other civil rights groups, GLAD proceeded with a two-year public education campaign in Maine.
On June 30, 2011, EqualityMaine and GLAD announced plans to place a voter initiative in support of same-sex marriage on Maine's November 2012 ballot.
[22] On May 2, 2013, the "Six by Twelve" campaign came to a close when Rhode Island's legislature passed a bill allowing same-sex couples to marry and Governor Lincoln Chafee signed it into law.