According to one embodiment, a GPS signal receiving apparatus comprises a receiving module configured to receive a GPS signal from a GPS satellite, an inclination detecting module configured to detect an inclination angle of the GPS signal receiving apparatus, a determining module configured to determine whether or not the receiving module receives a sufficient GPS signal to measure a position of the GPS signal receiving apparatus, and a notifying module configured to notify a user to change the inclination angle of the GPS signal receiving apparatus in accordance with the inclination angle detected by the inclination detecting module when the determining module determines that the sufficient GPS signal is not received.