Roqy – Bluetooth GPS uses SPP (serial port profile), but Ipod Touch / Iphone / Ipad only support HFP (Hands-Free Profile). Natively, Apple does not provide SPP to connect an external bluetooth GPS.
You may have to “Jailbreak” the Ipod Touch / Iphone / Ipad and use the application “Roqy” to connect external bluetooth GPS antenna to your iPad/iPhone. For detail, please refer to http://www.roqy-bluetooth.net/wp/
HoudahGeo – You can use this program to download MTK base GPS logger data to your Mac computer. http://www.houdah.com/houdahGeo/
It is driverless for most MTK base GPS loggers. (e.g. Qstarz GPS loggers)