This option is an in-app purchase.
GPS Share allows you to transmit live GPS data between devices via a LAN or Bluetooth. To use an ad-hoc Bluetooth network you must enable Bluetooth from your device's settings. One device, for example an iPhone, is designated the GPS host then other devices can be connected to it. This enables you to show position data on devices that do not include a GPS, like the iPod Touch. Map data cannont be shared this way.
TrakPal Pro is able to process Traks, play them back or run them as a virtual comparitor. You can share your recorded Trak route over a local wireless networks with anyone running TrakPal Pro, or via your desktop using iTunes. Set up TrakPal Pro to receive a file then send your Trak by tapping the matching receiver from the list.