The Global Energy System Model (GENeSYS-MOD) v4.0 - A Flexible Energy System Modeling Framework for Julia and GAMS. - Konstantin Löffler; Stian Backe; Julian Bornemann; Alena Diesing; Karlo Hainsch; Jonathan Hanto; Philipp Herpich; Nikita Moskalenko; Martha Pedersen; Dimitri Pinel; Dana Reulein; Shweta Tiwari (J. Open Source Softw., 2026)