I can't establish communication with the Arduino MKS GPS Shield (UBLOX SAM-M8Q) with a FTDI232 interface module (configured to 3V3). I'm using the u-center from UBLOX which is working fine with chinese GPS shields.
The MKS GPS Shield is running 'stand-alone' and is powered from the FTDI232 interface, but there is no RX/TX-communication?
Is the serial (RX/TX) communication not enabled by default out-of-the box?
Is there serial communication when there is no satellite fix?
Updated
Problem solved I misunderstood the text on the headers supplied with the shield. RX/TX was connected in the wrong way. 'TX ->' is connected to the GPS 'RX' and 'RX ->' is connected to the GPS 'TX' 
Check https://content.arduino.cc/assets/MKRGPSShield_V4.0_sch.pdf for further details
Now the MKS GPS Shield works with the u-center