Comparison of E(G_BP − G_RP) derived in this work, with the equivalent widths of diffuse interstellar bands at 862 nm derived from the same GSP-Spec spectra (left) and the Schlegel et al. (1998)E(B − V) with the Bonifacio et al. (2000) correction (right). For both plots, the grey colour-scale is the logarithm of the number of stars in one bin, and the red lines represent the running median. Overall, the correlations in both cases are very good.