How do you have it wired up to your FC? Have you enabled GPS in config.h for your FC? Has the GPS been programmed? what baud rate has it been programmed for?
Depending on what MW board you have, you may need to buy and hook up a part in between the gps and the FC to translate the data into something the FC can understand. Something like this
If you have the right kind of MW FC though you dont need that board though.