No. Unfortunately, this one is not working on the DashCam 20. Or I can't do it. "No update file found." massage is displayed. Can't make it working. Interestingly I found such strings in the FW of DC20 including strings like GDRsafetycam.dat and NAVICOM_SAFETYCAM.dat, and also some related to GPI - "Garmin/GPI_module/gpi_file.c".