Hi, I rent a C2Q 2.4ghz dedi box running CentOS 5. Up till now I've been using it for personal things, but am interested in hosting a few game servers to offset the 210 USD/month bill :).

Can anyone suggest a good Game Control Panel for Linux? Most of them seem to be outdated, or don't support linux (like TCAdmin :().

Thanks for the help!

brainless.us
Brand spakin new.

Have you looked at cPanel GS? I don't know much about it past its existance... if you already have a cPanel license you may want to take a look at it.

There is also...

www.gamecp.com
www.innovativegamingconcepts.com
www.gamecreate.com

Do i need to buy game license for CS 1.6 to host them on server?

No, you don't need a license to host any of the games made by Valve Software (including the Counter-Strike series, Team Fortress, Day of Defeat, and many others).
Do i need to buy game license for CS 1.6 to host them on server?

There is a very good guide on how to install a CS 1.6 server:

http://www.cstrike-planet.com/tutorial/1-Linux-Install-CS-16/6