This data set includes GAMS codes for the manuscript titled "Optimizing Unmanned Air Vehicle (UAV) Base Locations: A multi-objective optimization approach". There are four mixed integer programming models (M1, M2, M3 and M4) and one multi-objective algorithm (Alg1) coded in GAMS. The data used for the models are embeded in  the codes. The codes should be run in GAMS environment. Each code gives the optimal solution for the associated model in which optimal objective function and decision variables values are provided.