That's not a problem with this server, but a problem with gameguard. Gameguard is causing many problem on official servers too, see there:
Gameguard is really a problem, and cause players to leave rappelz and as I said, Gala is losing more innocent players than preventing bots, as show in the above thread, bots are still there, not only spamming the chat but also farming in unused part of rappelz. At the end, we will have only bots on rappelz, a real community of bots playing together in harmony, hey WTF gala is doing ?
But there, I really don't understand why a private server would use Gameguard, perhaps for the same things -- having the least possible players ?
(I know that this is unlikely that a private server has bots but well, why GG ??)
There is only 2 things that GG is good at, crashing your PC and prevent basic tasks ... (and also invalidating your windows licence, for some times at least, it could have been fixed now)
(And it has also a good way to check if the client has GG or not, bypassing this is not easy nor common, but it should not be at that cost)
And for those who still try to play on this server, why ? I don't know what this server propose, but others ones are really bad alternatives ?