This was a My Old Post, Take a look carefull.
(p.s. I don't GIve Support About That)
How to bypass Gameguard...
1)Download this => GameGuardEmulator
2)Open your hosts file with notepad [x:/windows/system32/drivers/etc/hosts (x = the name of your hard disk that windows are loaded)] and add this at the end
127.0.0.1 localhost
127.0.0.1 l2testauthd.lineage2.com
127.0.0.1 l2authd.lineage2.com
127.0.0.1 nprotect.lineage2.com
3)Extract the GameGuardEmulator and open "startapache.bat" now run lineage2
4)Gameguard bypassed!!
GameguardEmulator : --> here the link

have a fun !