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Well, if you have the right settings then you can know that IW intended on putting in GTNW as the sounds are in the game. Try it for yourself! Got this from the IW forums by the way.

*Note, it's only the sound, not the actual game mode.
Skidrow - Headquarters
Time: 10 mins
Score: unlimited
HQ lifetime: 1 minute
Active delay: 30 secs
Hardcore: enabled
Killcam: On
Respawn delay: Off
Spectating disabled
Killstreak rewards: Off
Wave spwan delay: Off
You must choose the rangers side!