Redpark is now shipping its GPS Cable for the iPad, iPhone, and iPod touch. According to the company, the GPS Cable allows iOS devices to connect to external navigation devices that use the NMEA 0183 protocol by offering a 30-pin connector on one end and a DB-9 connector on the other. the company claims that the cable is compatible with location-aware iOS apps—including the built-in Maps and Compass apps—and supports devices running iOS 5.x or later, including the iPhone 4S, iPhone 4, iPhone 3GS, fourth-generation iPod touch, iPad 2, iPad, and, presumably, the third-generation iPad. Redpark’s GPS Cable for the iPad, iPhone, and iPod touch is available now and sells for $59.