This antenna is only an active antenna. (power supply needed for the active part).
You WILL need a receiver in order to use it. Most current receivers are based on the Sirfstar II chipset, like e.g. the BU-303. Older ones are based on e.g. Rockwell chipsets.
This receiver converts the (1.3Ghz if i'm right) signal into a RS232 compatible signal. (With a MAX232 or something simular to make the levels PC-serial compatible).
Additional, a USB->Serial convertor might be included, mostly based on the Profilic chipset. Usefull for pc's without serial
Anyway: get a GPS receiver. I have a BU-303 and replaced its internal antenna with an external (waterproof) one, just like the one you have. But without additional electronics, its useless.