mrburnette:
You'll find a number of GPS clock projects here.You can easily see how the Adafruit GPS lib is used and I have the formatting in the shetch.
Ray
wow, this one https://www.hackster.io/rayburne/5-billion-arduino-gps-clock-for-25-496a20?ref=user&ref_id=506&offset=40 looks amazing, i'd like to know how to do this but just with a 4x20 LCD display, I supose the big LCD display it uses an I2C too.