There’s a need in Hall County for low- and moderate-income housing, said Pat Freeman, CEO of Legacy Link Inc., an area agency that provides services to seniors and their families. Legacy Link is one of more than a dozen agencies invited to a housing summit Friday by the city of Gainesville’s Community Development Department. The purpose of the summit is to try to bring together all the local agencies and government departments that deal with housing issues to find out what resources are available and if there’s duplication or gaps in services.