UP Xtreme GPS

Hello I have installed in my UP Xtreme system the mPCIe LTE module kit (Global) containing
Quectel 4G LTE CAT4 Global module EG-25G Mini PCI.

The LTE connection works but I have problem with GPS
Using minicom as suggested in the forum I have issued the command AT+QGPS=1 in order to enable GPS but I get an error (ERROR output response)

How can I debug it?

Is it required a second antenna in order to be connected to the GPS input of the EG-25G module?

Best Regards