If you buy a car through a regular bank mortgage, there is generally no GPS fee. The reason why the loan company wants to install GPS in the car is because the car does not belong to the owner in the case of installment payment, so it is necessary to install GPS to keep abreast of the car's movements.
GPS is generally installed in hidden places, such as front and rear bumpers, decorative plates under the front windshield, and taillights in the trunk. Wiring is generally installed under the steering wheel of the center console.