3rd Telem Port On Pixhawk?

On my pixhawk can I use the second GPS port as a 3dr telemetry port if I just change the serial settings? Im using the first two and need one more.

Thanks

https://ardupilot-org.slack.com/archives/general/p1474418348000358

Yup.
Set serial4_baud and serial4_protocol to what you need them to be (or serial 5).
Protocol will be 1 or 2, for MAVLink 1 or 2.
Serial 4 and 5 (like GPS which is serial 3) don’t have hardware flow control, so put your more critical/higher speed peripherals on serial 1 or 2.

Thanks for the info Ill keep it in mind.