IGNORE the first poster, they're WRONG.
Online classes have NO effect on your residency.
You can NOT change your residency while you're a student
Just moving to Georgia will not change your residency status, regardless how long you're there.
To be eligible for a change of residency, you must be able to prove you moved to said state for reasons other than to be a student (i.e. someone offered you a job, and you moved there for the position). After this you will have to show proof you have maintained a residence, including utilities and other assorted bills, out of your own pocket. You will also have to show proof you have changed your drivers license, vehicle registration, and become a registered voter.
After you have done this for 12 months consecutively, and you're over the age of 21, you can apply for official residency status.
If you then immediately quit your job, and apply to college, you will still be deemed an out of state student.
The ONLY state you're eligible for the in-state tuition discounts is your home state, where your parents reside and pay taxes.