GPS splitter with 200Ω DC load and 50Ω RF impedance on all ports
Look up what a bias tee is. It's likely that the 200 ohm load at DC is connected via bias tees.  A bias tee is basically a diplexer where one input is at DC and the other is at RF. They can be as simple as a capacitor for the RF path and an inductor for the DC path. So that would basically be what's shown in your schematic, except with inductors (or something equivalent) in series with the resistors.