It's not a coincidence that a majority of the kids that drop out of high school don't end up being anything. Whether you're intelligent or not, needing to get a GED (or worse, not getting one) pretty much disqualifies you from every job worth having. I understand the temptation but it almost never ends up being a decision that is looked back upon favorably.
Dropping out of high school very severely impacts someone's life. Without a high school degree, it makes finding a job much more difficult since there are few jobs available to people without a minimum of a high school degree. Many of these jobs are also much lower paying than people can get with a high school diploma, making life more difficult with tighter funds.