You can file a petition for child custody in your county's Superior Court. If you are divorcing, the petition will be included in your divorce papers.How to fill out the Petition for Legitimation and Custody in Georgia? 1. 1. Provide your name and details as the Petitioner. 2. 2. LawHelp Interactive is a website that helps you fill out legal documents for free. Click here to access and print the form. Fill it out and mail to our office. You should file a form called the JV-180 Request to Change Court Order for important issues that need to be addressed immediately. Other counties may also offer e-filing in their juvenile divisions. The steps to get child custody include filing a petition, developing a parenting plan, and going to court.