The Association began organizing twice-yearly annual meetings, in conjunction with the Health Association conference and the National Gay and Lesbian Task Force's Creating Change Conference.
In 2005, the Task Force protested against the Instruction Concerning the Criteria for the Discernment of Vocations with regard to Persons with Homosexual Tendencies in view of their Admission to the Seminary and to Holy Orders, which forbids the ordination of Catholic homosexual seminarians.
National Football League | United States Air Force | Royal Air Force | National Register of Historic Places | National Hockey League | England national football team | National Basketball Association | National Science Foundation | National Geographic | National Trust | National Endowment for the Arts | National Geographic Society | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health | National Guard of the United States | National Collegiate Athletic Association | United States National Research Council | National Portrait Gallery | National Academy of Sciences | Indian National Congress | United States men's national soccer team | National Research Council | Royal National Theatre | Royal Canadian Air Force |
The campaign has also received assistance from the National Gay and Lesbian Task Force and community leaders such as David Mixner, John Pérez, Reverend Troy Perry.
Costanza caused controversy when she invited fourteen National Gay Task Force leaders and gay rights activists to the White House at the height of Anita Bryant's homophobic "Save Our Children" campaign.
"The Harvey Milk US Postage Stamp Campaign" is also supported by LGBT organizations including the International Court System, Equality California, National Gay and Lesbian Task Force, Human Rights Campaign, Victory Fund, The Trevor Project, and GLAAD.