Hi, I'd like to help you with your question.
It sounds like your husband had a very poor evaluation. It does not matter what his GAF score is, he needs to be admitted into the hospital. He tried to kill himself which means he needs treatment as soon as possible.
Can you take him to the emergency room? He should be evaluated and the counselor/nurse needs to determine if your husband is still a threat to himself. If he is, he can be admitted. If he refuses to go into the hospital for treatment on his own, he can be forced. A 302 is a legal commitment that can force him to be admitted against his will. It has to be done by the person who saw or heard him say that he wants to kill himself.
Once your husband is admitted, he would be evaluated further and treatment would be offered. This includes medication, individual and group therapy. He will be referred to outpatient therapy once he is discharged. Appointments can be set up for him by a social worker from the hospital.
If your husband has PTSD, this is contributing to how he feels. No one can be partially PTSD. Either you have symptoms or you don't. You can have some symptoms, but you still would be considered PTSD.
I hope this has helped you,