Olympic champion and legendary coach Dan Gable will make a special public appearance at DePaul University in Chicago, Ill. on Sunday, November 16.    Gable will be appearing at the DePaul Student Center Multipurpose Room at 2230 North Sheffield in Chicago, from 2:00 p.m. - 4:00 p.m.    He will make a motivational speech, provide a question and answer period and be available to photographs and autographs.    The Gable appearance is open to the general public. All who attend are asked to make a donation of canned food for charity.    The activity has been organized by Joe Wagner, a DePaul student who founded DePaul's wrestling club. Wagner can be reached at 773-248-0185.