  Gas Electron Multipliers (GEMs) are used in many particle physics
experiments, employing their 'standard' configuration with amplification holes
of 140 um pitch in a hexagonal pattern. However, the collection of the charge
cloud from the primary ionisation electrons from the drift region of the
detector into the GEM holes affects the position information from the initial
interacting particle. In this paper, the results from studies with a triple-GEM
detector with an X-Y-strip readout anode are presented. It is demonstrated that
GEMs with a finer hole pitch of here 90 um improve the detector's spatial
resolution. Within these studies, also the impact of the front-end electronics
on the spatial resolution was investigated, which is briefly discussed in the
paper.
