Neutrino physics is an actively growing part of modern particle physics. In order to perform multiparametric fits to experimental data a software package called GNA was developed in the Dzhelepov Laboratory of Nuclear Problems of JINR. The main goal of this software is to create a universal way to analyse any kind of neutrino oscillation experiment. Initially it has been done only for reactor neutrino experiments such as Day Bay and JUNO [1]. This paper is devoted to including long-baseline accelerator neutrino experiment simulation into this package.

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