During your flight school attendance, you are going to carefully and consistently cover every bit of material that is going to be needed for the ultimate outcome. This being your check ride for obtaining your Private license. One thing you will very quickly hear about is the GPS system. This is not a historical piece of equipment and yes, you will be required to use them. The only reason there is no repetitive teaching on them is that the knowledge of them is not a requirement for your practical test. This is not something devious that your flight school is trying to pull off. In fact, many pilots do not even use them.
Once you are in school learning how to be a pilot you are going to make sure that you are familiar with all the material that is going to be available to you. You are going to hear about a system that is called GPS. You will have to gain the knowledge on how to use this system.