The same as it applies to parental custody issues. see related link
Depends how old "someone" is.
In Virginia, a 17-year-old is considered a minor and must have parental consent to live with another adult, such as grandparents. If the parents approve, the teenager can live with their grandparents without legal issues.
no
No she can not.
no
Joey was born in 1975 or 1976, which would make her 34/35. She was born in my parents, grandparents, and great-grandparents hometown of good ole' (but SMALL!) Alexandria, Indiana!
you can live with them for as long as you want although it would be weird. i moved out when i was 25
Sure, you're old enough to do so
she lived in Alabama at her grandparents house she was five years old at that time
no
No. You can choose when you are 18.
In Georgia, a 16-year-old may be able to choose to live with her grandparents if her parents are in agreement. If her parents do not consent, then the grandparents would need to petition the court for legal guardianship or custody. It would be best to consult with a family law attorney to explore the options available in this situation.