The Grey Art Gallery, New York University’s widely admired fine arts museum, will move to larger quarters at 18 Cooper Square from its current location on Washington Square East. The move is due, in part, to a major gift from Dr. James Cottrell and Mr. Joseph Lovett, which was announced a year ago. Longtime art patrons, social activists, and downtown Manhattan residents, Cottrell and Lovett have already gifted some 40 works from their extensive collection of downtown New York artists.