Usage uNavINS with another GPS module

[brightproject]

Good day @flybrianfly Thank you so much for your work! I would like to use the uNavINS library code, but I see that for it to work you need a NEO GPS module with the uBlox protocol. I can get it more accurately, but the TOW - Gnss.gps_tow_s() parameter confuses me. https://github.com/FlyTheThings/uNavINS/blob/ed2d0c56a9099f66a5fe93d4d87da317f7f61b0f/uNavINS.h#L89C31-L89C34 I think that I can get other parameters using the NMEA protocol.

Gnss.north_vel_mps(),
Gnss.east_vel_mps(),
Gnss.down_vel_mps(),

As far as I know, this is some specific time format of uBlox modules. Could you help with advice for the NMEA protocol? I plan to use GPS module GN02D.