GPS speedometer and stopwatck

i would like some help in using a 128x64 screen reading Km/h and a stop watch on the side ,then with 3 buttoms for stopwatch ,start stop,reset .then on the km/h a max value reached with a buttom to reset it .

the parts i can get are

UP501 fastrax GPs

KS108B screen

the rest i need some help please

i have the arduino software not that good at it yet but trying .

thanx

Anthony