Just like I thought It seems they’re sticking to the same GPS Support via the hot-shoe, which they introduced with the 5D Mark III. That’s great news for us, as it will greatly increase the chance for us to create an Unleashed for Canon.
Here’s the corresponding paragraph from their press release:
“The EOS Rebel T4i is also compatible with Canon’s previously introduced GP-E2 GPS Receiver that can be mounted to the camera’s accessory shoe. The GPS unit was created to serve outdoor photographers; it records shooting locations including latitude, longitude and altitude, as well as camera direction. A Logging function can tell how far a photographer has traveled as well.”