https://hetpro-store.com/TUTORIALES/gps-ublox-neo-6m-modulo-con-matlab/

GPS.m

clc
clear all
serialPort = 'COM27';
serialObject = serial(serialPort);
set(serialObject, 'BaudRate',9600);
 
fopen(serialObject);
pause(1);
size=serialObject.BytesAvailable
condicion =1;
while condicion == 1
A = fscanf(serialObject, '%c', 1);
if A=='$'
    NMEA =fscanf(serialObject, '%c', 5)
if NMEA == 'GPGGA'      
    TEMP = fscanf(serialObject, '%c', 11);
    LATITUD_NORTE=fscanf(serialObject, '%c', 12)
    TEMP = fscanf(serialObject, '%c', 1);
    LONGITUD_OESTE=fscanf(serialObject, '%c', 13)
    TEMP = fscanf(serialObject, '%c', 11);
    ALTURA=fscanf(serialObject, '%c', 8)
    condicion=0;
end
end
 
if(A<1)
    A = 1;
end
end
%fprintf(serialObject, '%c','v');
fclose(serialObject);
delete(serialObject);
clear s;