Apologies for the confusion before, was on VPN and haven`t noticed it.
So the way to get 27 USD ~ 22 GBP:
1. Connect to VPN to Moldova ( i used Surfshark VPN). It might work throught another ex-USSR countries (TBC).
2. Open browser in incognito/private mode and enter this link :
gog.com/en (be default will be in Russian so we need to specify the language).
3. On the main page you will see the current deals and the Baldur`s gate 3 for 27 USD.
Please let me know if it works when trying to buy it, as i haven`t bought it.