  Organizations have realized the importance of data analysis and its benefits.
This in combination with Machine Learning algorithms has allowed 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 a particular use case obtaining accurate results.
