Note, this is intended for the GPS watches that are designed for golfers. There are general Garmin GPS devices that can be used for golf, but their capabilities will be significantly less than the variations designed for golfing. With these types of devices, you will not want to constantly program the GPS to advance to the next hole. Thankfully, most of the time they will automatically advance to the next hole.
Unfortunately, this cannot be guaranteed to happen every single time. There will be times where you come across the situation where the GPS will become confused and not advance to the next hole. Technology is not perfect and mistakes will happen, but it usually is kept to a minimum. However, most of the time, once you select your golf course the watch will do the rest and you can sit back and enjoy a day of golf.