No, your 17 year old girlfriend cannot get married without her parents' consent. Under GA law [OCGA 19-3-2(b)]: "If either applicant for marriage is 16 or 17 years of age, parental consent as provided in Code Section 19-3-37 shall be required."
The above answer is a general explanation of legal rights and procedures. It does not constitute legal advice. Nor does it establish an attorney-client relationship between the individual posting the question and the attorney providing the answer.
Up until 2006, Georgia allowed a waiver of the age and parental consent requirements when the female minor was pregnant. Although Georgia no longer allows this exception, Tennessee, and some other states, still allow it. The parents will get notice of the application, and have an opportunity to oppose it. However, their opposition to it does not necessarily stop it from being granted. Good luck to you.
I am exclusively a family law attorney, practicing primarily in the metro Atlanta, Georgia trial courts. However, I handle appeals from anywhere in Georgia.
Her parents do have reason to "hate" you. You got a minor pregnant and it's their daughter.
If you seek a marriage license, they do get notice and can oppose it until she is 18.