Through its numerous contacts with city agencies and groups, GBLS conducts local outreach to identify those most at risk of becoming displaced. GBLS collaborates closely with Chelsea Public Housing tenants, Boston Housing Authority Resident Advisory Board, the Boston Rental Housing Resource Agency, Boston Aging Concerns, Young and Old United, ABCD, Boston Tenant Coalition, HUD Tenant Alliance, Greater Boston Interfaith Organization, and numerous other organizations in the city that work closely with this population. It works proactively in subsidized developments throughout the City and has had great success in preserving affordable housing for elderly and disabled residents in developments in Allston/Brighton and in Mattapan. This work often includes working closely with neighborhood community development corporations such as the Allston-Brighton CDC, the Asian CDC, the Fenway CDC, the Neighborhood CDC, and NOAH. GBLS also works closely with statewide organizations such as CHAPA.

GBLS staff also sit on the City of Boston's Elderly Housing Task Force and assist in identifying the multitudinous housing issues faced by Boston seniors as well as victims of domestic violence.