[en] In the eighties a two phases experimental program, called GEDEON, was designed at CEA for the validation of gadolinium depletion calculation in a 13 * 13 LWR assembly (3.25% ²³⁵U enrichment). In the first experiment, gadolinium pins are enriched with 3.5% of ²³⁵U and contained 5% in mass of natural gadolinium. In the second experiment gadolinium support pins are made of depleted uranium (0.2% ²³⁵U) and contain 8% in mass of natural gadolinium. DARWIN is an evolution code package developed at CEA in cooperation with industrial companies (EDF, Framatome, Orano) in order to compute physical quantities of radioactivity related to various application fields such as nuclear fuel cycle. This paper presents the first interpretation, with DARWIN2.3 package, of those two experiments with the aim of gadolinium depletion experimental validation of DARWIN. Interpretations are performed using the European evaluation file JEFF-3.1.1 and a 281 group energy mesh. Results show quite good agreements between calculations and measurements, in respect with experimental and calculation uncertainties, especially for ¹⁵⁵Gd and ¹⁵⁷Gd isotopes depletion. (authors)