I think all modern GPS antennae are "active" i.e. they have a built in amplifier. It draws about 30mA at 5V, IIRC.
There are a few passive ones around but the only one I have used is an Iridium/Thuraya satphone one which also has a GPS bit built-in - all passive. You can get one of these installed on your plane, to get weather data when airborne, or (with a load more wiring) even get voice comms so you can phone people up and pose
No standalone GPS I know of uses the passive GPS antenna part; it is purely for the GPS requirement of the satellite phones.