Uh, yeah. Menzoberranzan is not a Gold Box game, nor are the Ravenloft and Dark Sun games.
For the record, the Gold Box series (officially named in Unlimited Adventures, but referred to that way because of...erm.. being sold in gold boxes) is Pool of Radiance, Curse of the Azure Bonds, Champions of Krynn, Secret of the Silver Blades, Death Knights of Krynn, Gateway to the Savage Frontier, Pools of Darkness, Neverwinter Nights (AOL), Dark Queen of Krynn, and Treasures of the Savage Frontier.
Buck Rogers: Countdown to Doomsday, Matrix Cubed, and Unlimited Adventures used the Gold Box engine, but did not come in gold boxes. I count them, some people don't. Spelljammer Pirates of Realmspace uses the Gold Box combat engine, but otherwise a different interface. Some count it, I don't.