I understand there is no online multiplayer as the servers for the game were shut down, does this mean there is no LAN multiplayer at all?

AFAIK LAN should be available and you can use Gameranger - http://www.gameranger.com/

Is there any coop multiplayer in this game? I seem to recall losing interest in this game back when it came out because they announced that it was devoid of coop despite being a squad-based game, which is a setup that just begs for coop.

Not in the original release, but there is this mod (dunno if it works with GOG version) - https://www.youtube.com/watch?v=HNzUgYOZsMQ

so there in no online multiplayer game and no coop
does it have bots in LAN games