Hmm... GOG Galaxy should put it to or put again to winregistry when verifies game...
or you can do it manually
[HKEY_CURRENT_USER\Software\Battle.net\W2\Configuration]
"Battle.net gateways"=hex(7):31,00,30,00,30,00,30,00,00,00,30,00,35,00,00,00,\
75,00,73,00,77,00,65,00,73,00,74,00,2e,00,62,00,61,00,74,00,74,00,6c,00,65,\
00,2e,00,6e,00,65,00,74,00,00,00,38,00,00,00,55,00,2e,00,53,00,2e,00,20,00,\
57,00,65,00,73,00,74,00,00,00,75,00,73,00,65,00,61,00,73,00,74,00,2e,00,62,\
00,61,00,74,00,74,00,6c,00,65,00,2e,00,6e,00,65,00,74,00,00,00,36,00,00,00,\
55,00,2e,00,53,00,2e,00,20,00,45,00,61,00,73,00,74,00,00,00,61,00,73,00,69,\
00,61,00,2e,00,62,00,61,00,74,00,74,00,6c,00,65,00,2e,00,6e,00,65,00,74,00,\
00,00,2d,00,39,00,00,00,41,00,73,00,69,00,61,00,00,00,65,00,75,00,72,00,6f,\
00,70,00,65,00,2e,00,62,00,61,00,74,00,74,00,6c,00,65,00,2e,00,6e,00,65,00,\
74,00,00,00,2d,00,31,00,00,00,45,00,75,00,72,00,6f,00,70,00,65,00,00,00,63,\
00,6f,00,6e,00,6e,00,65,00,63,00,74,00,2d,00,66,00,6f,00,72,00,65,00,76,00,\
65,00,72,00,2e,00,63,00,6c,00,61,00,73,00,73,00,69,00,63,00,2e,00,62,00,6c,\
00,69,00,7a,00,7a,00,61,00,72,00,64,00,2e,00,63,00,6f,00,6d,00,00,00,38,00,\
00,00,47,00,6c,00,6f,00,62,00,61,00,6c,00,00,00,00,00
-------
Look at HKCU. So if there is more users on PC - it should be done for all of them.
And this one reg listed only official servers. For war2ru(or else) one string should be cnahged (in text view 1000/5/... 5 is for how many servers should be on dropdown menu in the game) and they should be added additnally to that.