Turner Broadcasting System said it will report a loss for the second quarter after taking a $20-million charge for expenses related to its unsuccessful effort to take over CBS . . . Baron Capital Management and Ronald S. Baron reported in an SEC filing that they raised their stake in Wrather Corp. to 8.3% . . . GTE Sprint announced that it will reduce its work force by about 600 during the next month . . . Gould Inc. said it has acquired International Cybernetics, a manufacturer of advanced computerized controls for factory and machine automation.