How to create an empty game in CS:GO

Both, the Steam client and steamcmd create a directory called SteamApps by default. Inside there's common/Counter-Strike Global Offensive and common/Counter-Strike Global Offensive - Dedicated Server respectively. The contents should be roughly the same for the game client and the dedicated server.

Copying the contents from the client to the server's directory and calling app_update 740 validate inside steamcmd (or steamcmd +login anonymous +app_update 740 validate) should result in a minimal download time.

Counter Strike:Global Offensive only works with steam. That being said, you need to download and install a little software here:

www.steampowered.com

After you have created an account and installed the software, you need to start up steam and on bottom left click "Activate retail game" after doing so , enter the serial key which came along your DVD and press enter. Now it will validate and associate the game with your account.

Notes:

You cannot play multiplayer even if you get the game working without steam.

If you do not have serial key w/ your DVD contact retailer.