V. A. Allakhverdyan Baikal-GVD Collaboration, A. D. Avrorin Baikal-GVD Collaboration, A. V. Avrorin Baikal-GVD Collaboration, V. M. Aynutdinov Baikal-GVD Collaboration, Z. Beňušová Baikal-GVD Collaboration, I. A. Belolaptikov Baikal-GVD Collaboration, E. A. Bondarev Baikal-GVD Collaboration, I. V. Borina Baikal-GVD Collaboration, N. M. Budnev Baikal-GVD Collaboration, V. A. Chadymov Baikal-GVD Collaboration, A. S. Chepurnov Baikal-GVD Collaboration, V. Y. Dik Baikal-GVD Collaboration, A. N. Dmitrieva Baikal-GVD Collaboration, G. V. Domogatsky Baikal-GVD Collaboration, A. A. Doroshenko Baikal-GVD Collaboration, R. Dvornický Baikal-GVD Collaboration, A. N. Dyachok Baikal-GVD Collaboration, Zh. -A. M. Dzhilkibaev Baikal-GVD Collaboration, E. Eckerová Baikal-GVD Collaboration, T. V. Elzhov Baikal-GVD Collaboration, V. N. Fomin Baikal-GVD Collaboration, A. R. Gafarov Baikal-GVD Collaboration, K. V. Golubkov Baikal-GVD Collaboration, T. I. Gress Baikal-GVD Collaboration, K. G. Kebkal Baikal-GVD Collaboration, V. K. Kebkal Baikal-GVD Collaboration, I. V. Kharuk Baikal-GVD Collaboration, S. S. Khokhlov Baikal-GVD Collaboration, E. V. Khramov Baikal-GVD Collaboration, M. M. Kolbin Baikal-GVD Collaboration, S. O. Koligaev Baikal-GVD Collaboration, K. V. Konischev Baikal-GVD Collaboration, A. V. Korobchenko Baikal-GVD Collaboration, A. P. Koshechkin Baikal-GVD Collaboration, V. A. Kozhin Baikal-GVD Collaboration, M. V. Kruglov Baikal-GVD Collaboration, V. F. Kulepov Baikal-GVD Collaboration, A. A. Kulikov Baikal-GVD Collaboration, Y. E. Lemeshev Baikal-GVD Collaboration, M. V. Lisitsin Baikal-GVD Collaboration, S. V. Lovtsov Baikal-GVD Collaboration, R. R. Mirgazov Baikal-GVD Collaboration, D. V. Naumov Baikal-GVD Collaboration, A. S. Nikolaev Baikal-GVD Collaboration, I. A. Perevalova Baikal-GVD Collaboration, A. A. Petrukhin Baikal-GVD Collaboration, D. P. Petukhov Baikal-GVD Collaboration, E. N. Pliskovsky Baikal-GVD Collaboration, M. I. Rozanov Baikal-GVD Collaboration, E. V. Ryabov Baikal-GVD Collaboration, G. B. Safronov Baikal-GVD Collaboration, B. A. Shaybonov Baikal-GVD Collaboration, V. Y. Shishkin Baikal-GVD Collaboration, E. V. Shirokov Baikal-GVD Collaboration, F. Šimkovic Baikal-GVD Collaboration, A. E. Sirenko Baikal-GVD Collaboration, A. V. Skurikhin Baikal-GVD Collaboration, A. G. Solovjev Baikal-GVD Collaboration, M. N. Sorokovikov Baikal-GVD Collaboration, I. Štekl Baikal-GVD Collaboration, A. P. Stromakov Baikal-GVD Collaboration, O. V. Suvorova Baikal-GVD Collaboration, V. A. Tabolenko Baikal-GVD Collaboration, V. I. Tretjak Baikal-GVD Collaboration, B. B. Ulzutuev Baikal-GVD Collaboration, Y. V. Yablokova Baikal-GVD Collaboration, D. N. Zaborov Baikal-GVD Collaboration, S. I. Zavjalov Baikal-GVD Collaboration, D. Y. Zvezdov Baikal-GVD Collaboration, A. V. Plavin, D. V. Semikoz, S. V. Troitsky

Various theoretical models predict cosmic neutrinos with multi-PeV energies. The recent detection of a ~10^17 eV neutrino in the KM3NeT experiment suggests that these energetic particles can be studied with present-day installations. Here, we present upper limits on the flux of astrophysical neutrinos with energies (10^15.5 - 10^20) eV obtained with the largest liquid-water neutrino telescope, Baikal Gigaton Volume Detector (GVD), using cascade-like events. We discuss astrophysical implications of these results and constrain several cosmogenic neutrino scenarios using a combination of Baikal-GVD, KM3NeT, IceCube and Auger data.