Simulated detectability maps of GJ 1214 b computed with EXoPLORE, assuming a single-transit observation with ANDES on the upcoming ELT. We compute the case of H₂O (left), CH₄ (middle), and CO₂ (right). The white (only for CH₄) and red contours indicate recovered S/N levels of 10 and 5 in ANDES in silico data, respectively. For comparison purposes, we also include the S/N = 5 curves (black) obtained from the empirical data analysed in this work (Fig. 7).