Gap, Inc.‘s Old Navy chain is piloting Apple’s iPod touch-based Point of Sale (POS) system at some of its retail stores, according to a new report. According to a 9 to 5 Mac report, the system has been rebranded “ZipCheck” for partner use, although it is the same as the “EasyPay” system used in Apple’s retail stores, and not a third-party solution. The ZipCheck system is said to wirelessly print customer’s…