The aim of this paper is to determine the impact of geomagnetic effects on positioning with the Global Positioning System during the geomagnetic storm on September 8, 2017. The paper examines the global effect of a geomagnetic storm on the geomagnetic field, which results in the degradation of the positional coordinates of the observation stations. The stations are located at various latitudes for a better representation of the entire process. At the beginning of the paper, the theoretical basis is stated, which includes the influence of space weather on the propagation of the GPS signal, which is the foundation of the research and is necessary for practical research. It includes the main properties of the GPS navigation system, structure and dynamics of the magnetic field of both the Sun and the Earth, and space weather, which includes the interaction of the Sun's and Earth's magnetic fields and their influence on the GPS signal. The research includes monitoring of geomagnetic indicators, the geomagnetic field and their influence on the positioning error in a certain observed period. A period of five days of observation was determined for the purpose of better insight into the entire dynamics of the process. A research area covering different latitudes (from the poles to the equator) near the prime meridian has also been determined The first step was to examine the geomagnetic indicators that indicate the dynamic progress of the geomagnetic storm. Then the examination of the components of the magnetic field of the observed magnetic observatories was started with the aim of determining to what extent a geomagnetic disturbance was created at different latitudes. An overview of the position error of observation stations, which are also located at different latitudes and are near the magnetic observatories, was made. Finally, through a correlation analysis, the influence of geomagnetic effects on determining the position with the GPS system during a geomagnetic storm for the observed area in the observed period was determined. During the research, various statistical methods were used with the aim of qualitative and logical reasoning.