Generational Residences and Nurturing Dwellings Act or the GRAND Act This bill establishes in the Department of Housing and Urban Development (HUD) a program to provide assistance for each fiscal year to up to five eligible nonprofit organizations to expand the supply of specialized housing and social services for qualified elderly relatives, age 60 or older, who are raising a child of whom they are not a parent either by blood or marriage. Nothing in this bill shall preclude a recipient of such assistance from applying for or receiving financial assistance under any other HUD program. The assistance must be in the form of: financing for the construction, reconstruction, moderate or substantial rehabilitation, or acquisition of a structure or a portion of a structure to be used as specialized housing; tenant-based rental (voucher) assistance under the United States Housing Act of 1937 for entities meeting certain criteria for use only by qualified relatives who are raising a child and are eligible for such assistance for rental of a dwelling unit that qualifies as specialized housing; elderly housing project rental assistance under the Housing Act of 1959 for entities meeting certain criteria in connection with dwelling units that qualify as specialized housing and are made available for occupancy only by qualified relatives who are raising a child and are eligible for occupancy in such housing; and help with ongoing operational expenses of any specialized housing, including costs of supportive services required for such housing.