G.W. Carver High School is actually Papillion-LaVista High School, located in Papillion, Nebraska, a suburb of Omaha. Director Alexander Payne wanted to use Omaha North High School (an older, more "traditional"-looking three-story school), but the Omaha Public School's superintendent refused after reading the script and deeming it inappropriate.
If you look closely at some of the 'PICK FLICK' cupcakes Tracy places on the table before offering one to Mr. McAllister, you'll notice some of them spell out a very obscene word because the bottom of the 'L' in the word 'FLICK' is elongated.
Tracy Flick: [narrating]
None of this would have happened if Mr. McAllister hadn't meddled the way he did. He should have just accepted things as they are instead of trying to interfere with destiny. You see, you can't interfere with destiny, that's why it's destiny. And if you try to interfere, the same thing's just going to happen anyway, and you'll just suffer.
Tracy Flick: Dear Lord Jesus, I do not often speak with you and ask for things, but now I really must insist that you help me win the election tomorrow because I deserve it and Paul Metzler doesn't, as you well know. I realize that it was your divine hand that disqualified Tammy Metzler and now I'm asking that you go that one last mile and make sure to put me in office where I belong so that I may carry out your will on earth as it is in heaven. Amen.