GPS antenna reference design
All of these components are nominally 50 Ohms. For a receiver, improving the impedance match doesn't have a big payoff, so if you're not experienced, you are probably better off putting a DC blocking capacitor between the each stage and moving on.
I'd suggest this, because the LNA may be biased internally in such a way as to have a DC voltage at either the input, the output or both. If you antenna has a DC short, then you'll effectively short out the LNA on the input. On the Output, SAW filters can be sensitive to a DC Bias, so a DC Block could help that last longer. The same on the Output of the SAW/Input to the GNSS chip. The GNSS chip may be able to feed +3V out of the RF port to power a remote antenna, which could cause problems with your SAW.