[en] Gas Electron Multiplier (GEM) is one of the Micro Pattern Gaseous Detectors (MPGDs) which is characterized by reasonably good position resolution and high rate capability. These are high granularity gas detectors with very small gap between cathode and anode electrodes. High granularity of these detectors offers good position resolution and small gap between the electrodes offers high rate capability, thus they are being widely used for tracking and timing purposes in various high energy physics experiments. GEM detectors have a very thin dielectric foil coated with copper on both sides, placed in between cathode and anode. This foil has numerous holes, across which very high voltage is applied to make them a multiplication region for electrons. Thus GEM has a separate drift gap, multiplication gap and an induction gap. This is the motivation to explore the dependence of various figures of merits such as pad multiplicity, spatial resolution, timing resolution on different electromagnetic and geometric configurations