_GPSFIXQUALITY returns the quality of the fix as an integer.
0 = no fix
1 = GPS SPS Mode, Fix Valid
2 = DGPS, SPS Mode, fix valid
3 = GPS PPS Mode, fix valid
4 = Real Time Kinematic
5 = Float RTK
6 = Estimated (dead reckoned)
7 = Manual input mode
8 = Simulator mode
The GPS internal variables require a GPS (internal or external) that supports the Windows Sensor Location APIs. Note that your GPS may not support all of the variables. If a value is not supported Windows will return "Element not found". Unless otherwise specified, the values returned are decimal numbers (for example, 38.735122).