When you export GPS/GNSS, you can report what got exported by turning on the [x] Details toggle in the Export dialog.
Exporting Local Coordinates
If your coordinates are local coordinates, like 5000/5000, that are not on a CRS, you still export them to GPS/GNSS via TPC's Site Calibration. The report will show the local coordinates, the calibrated coordinates and the resulting geodetic position exported.