SAN FRANCISCO--(BUSINESS WIRE)--Gap Inc. (NYSE:GPS) today reported that net sales were up 4 percent and comparable sales were positive 3 percent for the November and December 2014 holiday shopping season, compared with last year. “During November and December, we were pleased to achieve a positive 3 comp, led by Old Navy with a very strong 12 comp for the combined holiday months,” said Glenn Murphy, chairman and chief executive officer of Gap Inc. December Sales Results Net sales for the five-w