This story is part of the Art of Gentrification, an investigative series looking at how the Savannah College of Art and Design has impacted the city’s downtown and surrounding neighborhoods.  Protected from the pelting rain in red and blue ponchos, four figures stood on the northeast corner of Fahm and Turner streets and threw verbal rocks at Turner House, the five-story co-ed residential complex for first-year Savannah College of Art and Design students. “Black people used to live here!”  Keiajah Brooks, an activist and merchandise designer, bellowed into her megaphone as she led the protest. Across the street, parents and students hauled mini fridges, futons, luggage and desk lamps down the sidewalk…