With ROS 6(long-term) I could get GPS data with modem init string (AT+QGPS=1) under the LTE interface.

This does not work for me with ROS 7.3.

Is this a known issue with ROS 7?

Had to reconfigure the card with AT+QCFG="usbnet",1 (from AT+QCFG="usbnet",2).

Now GPS behaves like ROS 6.