My iGuidance log files work with GPS Gate. It's basically just a text file with a bunch of NMEA strings. Should look something like this.
Code:
$GPGGA,235844.568,3852.4739,N,07714.7751,W,1,06,1.2,72.1,M,-33.5,M,0.0,0000*7A
$GPGSA,A,3,10,29,02,04,30,05,,,,,,,2.4,1.2,2.0*3F
$GPRMC,235844.568,A,3852.4739,N,07714.7751,W,22.33,173.20,141205,,*26
$GPGGA,235845.568,3852.4677,N,07714.7741,W,1,07,1.0,72.4,M,-33.5,M,0.0,0000*77