it's Gloria Walker, Charles Mapes' sister??

According to Dwayne Kling's "The Rise of the Biggest Little City" "On June 18, 1969, Charles Mapes and Gloria Mapes Walker appeared before the Nevada Gaming Control Board and applied to be licensed for 50 percent each of the Money Tree Casino...On June 28, Charles Mapes and his sister, Gloria Walker, were given final approval by the state."