García Tejedor, Álvaro JoséNogales Moyano, Alberto2023-02-272023-02-2720222665-9638https://hdl.handle.net/10641/3281Organizations have realized the importance of data analysis and its benefits. This in combination with Machine Learning algorithms has allowed us to solve problems more easily, making these processes less time-consuming. Neural networks are the Machine Learning technique that is recently obtaining very good best results. This paper describes an open-source Python library called GEMA developed to work with a type of neural network model called Self-Organizing-Maps. GEMA is freely available under GNU General Public License at GitHub (https://github.com/ufvceiec/GEMA). The library has been evaluated in different particular use cases obtaining accurate results.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Machine learningNeural networksSelf-organizing mapsjournal articleopen access10.1016/j.simpa.2022.100280