Can I get 22 year old male out of jail and off the sex offenders list when I turn 18 and was 15 at the time?

No.

Is it legal to be married and have a live in boyfriend in ga and have kids in the Home? If it is who made that legal.

It sounds like adultery and is grounds for divorce.

You have the right to joint legal custody. Primary physical custody will probably be given to the mother and you will have visitation.

Would Georgia laws give maternal grandma custody over father?

Grandma is not likely to get custody unless it is through a deprivation action.

Can a family member represent you

Only if they are an attorney in the state where the lawsuit is filed or if they get leave of the court.

Do I still need to go through divorce procedures?

Yes, otherwise you may commit the crime of bigamy. Consult a local attorney.

My husband of 25 years has become verbally abusive, and we argue all the time. He refuses to get out of the house

To answer this question as a legal question is to say get a divorce. I think you need counseling or something to give you and your spouse a second...

What should i do? do i need a lawyer or is it to late?

Get divorced, it sounds like his past will continue to repeat itself.

If my ex and I have mutually agreed to new custody terms, what forms do I need to download?

File a motion for modification of custody and file a consent order.

It depends on any agreements over the child. Child support, custody or visitation disagreements will make it cost more.