A suggestion for everyone - put your server and SG at the beginning of your Bio. Can always edit it out later if we get a better way to share that info figured out.
Another useful option, since not everyone will necessarily look at everyone's Bio, use a keybind on your enter key to append the above info (abbreviated if need-be) to the beginning of your chat messages.
/bind enter "beginchat (ServerName SGIinitials) "
Example:
/bind enter "beginchat (Victory, LoV) "
would always appear in-game as "(Victory, LoV) My message here."
Note the space before the second quotation mark in the bind, it'll make sure there's a space between the bracketed info and your actual message.
Alternatively, you can bind it to a different key if you want to keep the enter key "clean" for local chatting. I usually bound it to the "\" key back when the game was still running, for example. I used this bind to announce what character I was currently playing on whenever I was chatting in my SG's global channel, since it wasn't always apparent, such as if they were red side. I see no reason why it couldn't also be used to announce what server you're from, if that's what you want.