The UDB4 IMU designers suggest this kind of GPS module to be connected to that board. They have done a lot of tests on it, solved many problems, used the proprietary binary protocol to speed up the communication, installed a compatible socket on the UDB4 board.
It is based on the famous and widely used SiRF star III chip set, it's used on many different projects, often related to IMU.
Perfect, I'll use it too on my project. Much more headaches less.