It appears that Blackvue dashcams log GPS data in “almost” NMEA format.
It is possible to convert the file using gpsbabel utility into KML format that google maps/earth can understand.
All you need to do is strip time stamp appended to each line in the log and them process the output with gpsbabel:
cat {BLACKVUE_GPS_LOG}.gps | awk -F ']' '{ print $2 }' | egrep -v '^$' > {BLACKVUE_GPS_LOG}.nmea
gpsbabel -i NMEA -f {BLACKVUE_GPS_LOG}.nmea -o KML -F {BLACKVUE_GPS_LOG}.kml
This is what log looks like:
[1389266060242]$GPRMC,221417.990,A,4533.1826,S,16737.5506,E,054.7,035.5,080114,,,A*77
[1389266060242]$GPVTG,035.5,T,,M,054.7,N,101.4,K,A*0C
[1389266060242]$GPGGA,221418.990,4533.1701,S,16737.5631,E,1,11,1.1,204.6,M,1.7,M,,0000*78
[1389266060242]$GPGSA,A,3,16,07,03,19,23,13,10,06,09,27,08,,2.0,1.1,1.7*3D
[1389266060242]$GPGSV,3,1,12,13,80,310,39,07,50,247,36,23,50,019,48,03,48,066,46*71
[1389266060242]$GPGSV,3,2,12,16,45,128,43,27,42,084,44,06,41,096,44,19,28,038,46*79
[1389266060242]$GPGSV,3,3,12,10,26,260,31,08,19,261,32,09,16,257,26,05,06,210,*77
[1389266061239]$GPRMC,221418.990,A,4533.1701,S,16737.5631,E,054.8,035.0,080114,,,A*7F