This contribution describes the software and electronic improvements implemented in the GREGOR Infrared Spectrograph (GRIS) installed on the Gregor telescope. It is located at the Teide Observatory, in Tenerife, Islas Canarias, Spain. As a demonstrator for an instrument for the European Solar Telescope (EST), this project aims to perform simultaneous spectropolarimetric observations in several spectral lines using several synchronized detectors that may operate at different synchronized frame rates. Throughout the article, the problems encountered in achieving the synchronization of two or more sensors and the solutions proposed to solve them are explained.