nmea data

Yes, The first two letters of an NMEA sentence describes the 'Talker', so:-
GPGSV = GPS Satellites in View
GLGSV = Glonass Satellites in View
BDGSV = Beidou Satellites in View
GAGSV = Galileo Satelites in View

Here are some examples :-

GPS satellite Numbers at 1:03:38:927 p.m. 3OCT2017
$GPGSV,3,1,12,01,67,282,40,03,28,217,21,10,14,052,28,11,81,246,27*7F
$GPGSV,3,2,12,14,33,098,24,17,12,312,27,22,52,209,33,27,09,146,30*79
$GPGSV,3,3,12,28,32,282,41,32,35,077,23,08,41,158,,24,02,009,*76

Glonass satellite Numbers at 1:03:38:926 p.m. 3OCT2017
$GLGSV,2,1,08,70,37,040,19,86,74,097,25,77,09,281,14,79,07,011,18*62
$GLGSV,2,2,08,87,40,312,29,85,18,122,21,71,70,133,23,72,26,191,*62

Beidou satellite Numbers at 1:03:38:928 p.m. 3OCT2017
$BDGSV,2,1,06,211,18,305,36,205,07,113,,206,04,029,,209,30,046,*67
$BDGSV,2,2,06,212,73,274,,215,06,074,*69

Galileo satellites Numbers at Unknown time
$GAGSV,2,1,05,311,14,323,,312,48,282,25,319,66,289,23,326,02,167,*65
$GAGSV,2,2,05,330,11,038,29*6D