I've added Russian language GSManager 1.2.1, wanted to give us something to help and so to speak to expand the audience of users ... I hope I did not break nor a licensing agreement, but whatever it was, you can delete it or add-in program from its name!
Unpack the archive into a folder with the program and set in the config russian language and character Windows-1251 as in the image below.
The project GSManager (formerly ManuAdminMod) was discontinued on 01.01.2020 - this internet presence stays available, but the software is no longer maintained. Thanks for your support over the more than 10 past years!