While Hollywood might glamourize "grand theft auto" in films, on TV, and in video games, the truth is that in reality being arrested for grand theft auto is not entertaining at all. The state of Florida comes down hard on this charge. Grand theft auto is something that can happen to just about any citizen. Don't confuse the commercialized version with the real world consequences of it.
If you get arrested on suspicion of grand theft auto, prosecutors and judges will not show you any leniency. Grand theft auto is considered to be any time you take or "steal" an automobile without permission from the owner. You might hear about a lot of these cases involving family or domestic issues. Since it's a form of theft, the charges for the crime will depend on the value of the automobile.
Since it depends on the value of the car: a first degree charge is $100,000 or more; a second degree charge is anywhere between $20,000 and $100,000; a third degree charge falls between $300 and $20,000.
A conviction for this can include being incarcerated in a state prison, probation, over $5,000 in fines, and hours of community service. This is why you can't hesitate to hire a criminal defense lawyer for a serious matter such as this. If you are a first-time offender and you have a skilled attorney defending you, there is some hope. There is a chance at a reduction in the charges through negotiation, plus alternative sentencing measures such as counseling, community service and driver's education. Whatever it takes to keep you from spending time behind bars for a big mistake.