A GPS device comprises a GPS unit, a visor, and an optional attachment means to attach the visor to the GPS unit to improve the viewing of the visual display screen under bright light and/or to eliminate the reflection of the lighted display screen of the GPS unit from a vehicle's windshield during nighttime driving; a visor set comprising said visor and said attachment means; said visor or visor set optionally comprising a GPS antenna for stronger reception and/or a faster acquisition of satellite GPS signals; a method for improving the viewing of the display screen under bright light, for eliminating reflection of the display screen from the vehicle's windshield, and for providing improved satellite GPS signals by using the GPS device or the visor set hereinabove; and an article of manufacture comprising the GPS device or the visor set hereinabove, in association with instructions for use.