Comparison of fundamental parameters and final iron abundances obtained for a sample of ∼600 stars from the GES DR3. In all panels we compare the results obtained by applying to the spectra our spectral analysis procedure to those released as part of the GES DR3. In the four upper panels, we compare results for the global fundamental parameters T_eff, log(g), [M/H], and [α/Fe]. In the large lower panel, we compare GES recommended metallicity with those we measured with Bacchus, both determined from iron line-by-line measurements.