It's an 0402 sized component. Measures about 50 milliohms out of circuit. I also measured it with a cheap LCR meter and it shows -47nH. Capacitance measures 350mF. So I'm pretty sure it's a jumper. It's weird that it's on an antenna GPS feed line coming in from the middle right.
It looks like it's shorting the signal to ground. The component is half green half black and there are a few others of these on the circuit.
If it is a jumper why is it shorting the signal to ground?