Hi Ramesh,
Really, the source code that is provided is given as a reference. If you want help porting the given code to a different platform see this page: http://processors.wiki.ti.com/index.php/CC4000_MCU_SW_Description#Porting_Guidelines
However, the CC4000 really is simple to use. So if you just need the latitude, longitude and speed, your code should be much, much simpler. Mostly, it's all about using the UART to recieve NMEA messages. There is plenty of information about NMEA 0183 on the web, and although we have a sample NMEA sentence parser in the example code, there are other open source NMEA parsers out there as well.
Regards,
Aaron