// Include the SoftwareSerial library
#include "SoftwareSerial.h"
// Constants
#define txPin 8     //tx pin in gps connection
#define rxPin 9      //rx pin in gps connection
// Set up the gps serial port
SoftwareSerial gps = SoftwareSerial(rxPin, txPin);
// Variables
byte bytegps = 0;  
int i = 0;
int state = 0;
char dataGPG[100]="";
char *pch;
char *GGA[15];
int sat = 0;
void setup(){
//setup for Serial Port
Serial.begin(9600);
Serial.flush();
 
//setup for gps Serial Port  
pinMode(rxPin, INPUT);
pinMode(txPin, OUTPUT);
gps.begin(4800);
gps.flush();
//setup satellites signal
pinMode(13, OUTPUT);
digitalWrite(13, LOW);     // Turn off the led until a satellite signal
}
void loop(){
gps.flush();
Serial.flush();
Serial.println("Waiting gps data...");
// Prepare all for reading gps Serial Port
memset(dataGPG, 0, sizeof(dataGPG));    // Remove previous readings
bytegps = 0;                            // Remove data
bytegps = gps.read();                   // Read the byte that is in the gps serial port
delay(1000);
// Find the desired string
while(bytegps != '$'){
bytegps = gps.read();
} 
// Save the string in an array
i=1;
dataGPG[0] = '$';
while(bytegps != '*' ){
bytegps = gps.read();
dataGPG[i]=bytegps; 
i++;
} 
dataGPG[i]=bytegps;
string();         // Call to the function that manipulates our string
}
/*
This function will allow us to identify the data we need to get the longitude, latitude ...
*/
void string(){
i=0;
memset(GGA, 0, sizeof(GGA));          // Remove previous readings
pch = strtok (dataGPG,",");
// Analyze the saved interval in pch to see if it the needed string
if (strcmp(pch,"$GPGGA")==0){
while (pch != NULL){
pch = strtok (NULL, ",");
GGA[i]=pch;    
i++;
} 
plot(GGA,"$GPGGA");         // Call to the function that is going to display the data
}
}
/*
This function organize the gps data received for printing in the serial monitor.
*/
void plot(char **GGAPrint, char *trama){
state = atoi(GGAPrint[5]);
sat = atoi(GGAPrint[6]);
if(trama=="$GPGGA" && state==1){
digitalWrite(13, HIGH);      // Then there are satellites, the LED switch O
Serial.println("");
Serial.println("----------------------------------------------");
Serial.print("UTC Hour -> ");
Serial.println(GGAPrint[0]);
Serial.print("Latitude -> ");
Serial.print(GGAPrint[1]);
Serial.println(GGAPrint[2]);
Serial.print("Longitude -> ");
Serial.print(GGAPrint[3]);
Serial.println(GGAPrint[4]);
Serial.print("gps quality: 0=null; 1=gps fixed -> ");
Serial.println(GGAPrint[5]);
Serial.print("Number of satellites -> ");
Serial.println(sat);
Serial.print("Horizontal Dilution of Precision -> ");
Serial.println(GGAPrint[7]);
Serial.print("Antenna altitude -> ");
Serial.print(GGAPrint[8]);
Serial.println(GGAPrint[9]);
Serial.print("Geoid Separation -> ");
Serial.print(GGAPrint[10]);
Serial.println(GGAPrint[11]);
Serial.println("----------------------------------------------");
Serial.println("");
}
else{
digitalWrite(13, LOW);                                              // Turn off the LED
Serial.println("");
Serial.println("-----------------------------");
Serial.print("|--- Satellites Used -->");
Serial.print(sat);
Serial.println(" |");
Serial.println("|----Waiting location----|");
Serial.println("-----------------------------");
Serial.println("");
}
}  

 In out Serial monitor will see the next data.