Journal of Information & Systems Management Olivera Petrovska, Vesna Antoska Knights and Stojche Deskovski 12 1 2022 https://doi.org/10.6025/jism/2022/12/1/12-21 https://www.dline.info/jism/fulltext/v12n1/jismv12n1_3.pdf We have presented a mathematical model of the aircraft system for automatic guidance for landing using GPS –GBAS. Further we performed the simulations for landing guidance system when using the ILS and GPS – GBAS. To do the simulations, the programming package MATLAB/SIMULINK is used. In the current work, a, comparative analysis of the results of the simulations and the discussion the advantages of GBAS in terms of ILS are given.