Allah is the personal name of the creator of this universe. The word Allah means the one who is the source of and centre of every good and free from any evil. I love Allah and pray to him that he also do so.
No, people don't use Allah as a name - that would be blasphemous. This site is about the history and meaning of names, not about proper names for children. The "name" Allah is, though, a part of many names, like Abdallah.
By 'God' do you mean Jehovah, Allah or Brahman? I say this to illustrate how many people one might offend if they quite literally name their kid 'God.'
Of course no one would name their son Allah any more than they would name their kid Jehovah or Brahman, or Amaterasu or whatever. That is why this name is listed under theology.
I'm curious to know the exact pronunciation and where the stress falls in this name. Here, everyone says al-luh (like the first two syllables of Alabama). Or, in a few better cases, it's said as ah-luh. But something tells me that those pronunciations are very, very Americanized.
Somewhere, I've heard it pronounced as "ahl-LAH", with the "ahl" being very brief. That's how I'd like to think it's pronounced, but I know very little about the Arabic languages, unfortunately.
Please don't name your kid this. It would sound offensive and, as a Muslim, I think Allah would be pretty furious. Instead, why not use a name that is evocative of one of His titles, such as Malik, Aziz, or Rahim? (Just add an A at the end for most of them to feminise them.) You could also use Abdullah, which means "servant of Allah".