The current implementation only recognises two talker codes - GP and GN.
Please support a wider range of talkers, for example:
GA - Galileo
GB - BeiDou
GI - NavIC
GL - GLONASS
GP - GPS
GQ - QZSS
GN - GNSS / More than one of the above

Ref: https://www.nmea.org/Assets/20190303%20nmea%200183%20talker%20identifier%20mnemonics.pdf