GOG does not sale to Russia at the moment.
Any high quality VPN will work with Steam/GOG and you are able to buy the game for just a few cents or Turkish lira. hint
Most known VPN provider will not work with Steam to trick the "I am from another country, sell me the other stuff from country XY", because Steam is not that stupid.
There are a ton of guides on the internet, OP, you need to spend more effort into this.
Also, there will be no guide on FAF how to dodge those restrictions, because this is not an advertisement platform for VPNs and neither a platform for shadyish tutorials.
However, I can verify, that it takes literally like 3 minutes to make such Steam account to buy restricted games from other countries, when you just use 1 minute google.
Thread closed, all important stuff to that topic was already said.