SIM808 with Arduino UNO

i am really new to using arduino and have took up a project to make a live vehicle tracking application using SIM808 and Arduino UNO. i have tried a 100 times and have failed so i need your help.

i have a seperate module of SIM808 and will have to use Rx and Tx pins to program the Module. Can someone write me an arduino code to extract Longitude and Latitude from the module and send it to an URL.it will be very helpful. my Module uses GNS commands and not GPS commands. thank you <3.