A passive antenna is designed to work without power supply and amplifying circuit. It receives weak signals and transmits to host receiver directly. In open sky view areas, GPS/GNSS signals are usually good enough for receivers' reception. Depending on usages and design of GPS/GNSS receivers, passive antenna are also widely used in positioning and navigation equipment.
For your choice, determine that your GPS/GNSS receiver uses a passive antenna first, i.e. no power supply to it, then check what connector type matches your receiver and finally determine your mounting option and cable length.