Abstract <p>Possible products of hadron-nucleus interactions in a hadron beam of intermediate energy of 5–10 GeV are secondary excited nuclei. During transitions from an excited state to the ground or another excited state, such nuclei emit photons of MeV energies corresponding to the difference in the levels of the transition of excitation of nuclei. The energy spectra of photons from deexcitation of nuclei are their characteristic features. Therefore, the detection of these photons of gamma-nuclear transitions allows for identification of nuclei formed in the final state of such a reaction. In turn, studying the correlation of the excitation spectra of secondary nuclei with the type and parameters of hadron systems escaping in this case into the reaction forward hemisphere opens up opportunities for studying the dynamics of hadron-nucleus interactions. This paper presents the first results of measuring the gamma-nuclear transition spectra in the Hyperon+ experiment in a test run to collect statistics on hadron-nucleus interactions with a momentum of 7 GeV/<i>c</i> on a carbon target (¹²C) using a gamma-nuclear transition (GNT) spectrometer. The obtained results can be interpreted as an observation of a number of gamma-nuclear transitions of ¹¹C nuclei produced in the final state of events selected by the trigger for the interaction of beam particles with the target.</p>