Gas Electron Multipliers (GEMs) play a crucial role as amplification
stages in modern gaseous detectors, offering high spatial resolution at
moderate cost, even at large sizes. At the FTD, we have successfully developed a reliable process for producing standard 10×10cm2 GEM foils, using a photolithographic technique. This talk will give an insight to the production and quality assurance workflow, highlighting key innovations, showcase measurement results confirming the reliability of the foils, and outline plans for exploring novel GEM parameters and geometries.