How to validate a gps message; validating gps output messages by lighting an led

This is the code for extracting the desired gps code:

#include

#define RXB8 1
#define TXB8 0
#define OVR 3
#define FE 4
#define UDRE 5
#define RXC 7

#define FRAMING_ERROR(1<#define DATA _OVERRUN(1<#define DATA_REGISTER_EMPTY(1<#define RX_COMPLETE(1<
//Get a character from the UART1 Reciever
#progma used+
char getchar1(void)
{
char status,data;
while(1)

{
while(((status=UCSR1A)&(RX_COMPLETE)==0);
data=UDR1;
if((status &(FRAME_ERROR|DATA_OVERRUN))==0)
return data;
};

}
#progma used-

/* Get GGA information from the UART0 Reciever*/
void getGGAmessage(char*message){

char header7="GPGGA";
int i=-1;

do{
getmessage(message,0)
i=strncmp(header,message,6);
}
while(i !=0);

}

/* Get present GPS position*/

void getposition(char*position){

char message85 = {'\0'};
char temp15 = {'\0'};
char terminate3 = "n\0";
int num_satellites = 0;

/*Get GGA(Global Positioning System Fix Data) message*/
getGGAmessage(message)

/*Get Satellites used in Calculation*/
strncpyind(temp,message,((num_satellites*3)-1),11);
strncat(position,temp,((num_satellites*3)-1));

strncat(posiion,terminate,2);

}

How do I validate that I am getting the correct gps message using lit leds?