GPS receiver with RS232 via PS2 breakout
Mbed with low-cost serial BR355 GPS using RS232 breakout and PS/2 breakout for power.
The BR-355 GPS dongle is a cheap, easy, and effective solution for adding GPS to any project. The default connector is a PS2 connector, but this can be broken out to anything you choose. See link below for various solutions.
The full details for breakout out the PS2 connection to a breakboard can be found here http://developer.mbed.org/users/snavare3/notebook/mbed-with-low-cost-serial-br355-gps-using-rs232-br/