Connect to External GPS

I have a SX1303 Lorawan Hat from Wavehsare on a Pi 4b. My application kindof requires GPS. The hat has a L76K GPS chipset built in and it sounds like Chirpstack only supports UBLOX based GNSS.

That doesn’t seem like a big deal, I have a number of UBLOX based serial GPS units to hand, is it possible to change the serial endpoint so I can connect a GPS to a different set of pins (or the USB?) on the pi?

Thank You