I’ve already reviewed Gossip Girl once, and really twice, considering that the impressions from my Test Pilot preview this summer pretty much hold up. So I’m not going to review it a third time here, because of (1) deadlines and (2) what am I, a sucker? But here’s a public-service reminder to the O.C.-deprived to get on on the ground floor when this potentially sin-tastic rich-kid soap debuts tonight. For those of you offended by shows that suggest that teenage prep schoolers may actually have sex and do drugs, there’s a nice Kelsey Grammer sitcom debuting instead.