Top: from left to right-hand side, columns show CMDs of the PARSEC MS used in execution G13P-13, Gaia DR3 G < 13 data, distance per pixel between them (each of the elements of the summation in Eq. (4)), and their absolute difference in number of stars. From the top to the bottom rows, we find the CMDs for the three considered latitude ranges 30 < |b| < 90, 10 < |b| < 30, 0 < |b| < 10. Bottom: same as on top but for the final BGM FASt PS obtained from the application of the fitting process described in Sect. 2.1 on PARSEC MS.