The official website for this project is here until March 21st, 2023.
Since January 2020 and version 2.0 (Linux/Unix/Mac), the Gostcrypt project is no longer public and is restricted to a limited number of users and contributors.
The official project website was closed on March 22nd, 2023. The Gostcrypt project, since version 3.0 has become a private R&D project for a restricted community. Gostcrypt version 2.0 was a transitional version (rewriting of the GUI in Qt from scratch, addition of new cryptographic standards in mutatinbg mode) and was never made public.
The whole archive up to version 1.3 is available here