Yes, your inmate will get a Certificate of Completion. He can arrange for this to be copied and mailed to his attorney. If you want to try and expedite the process, call the facility and ask to speak with the C.O. in charge of education. They might send it to you directly.
https://www.inmateaid.com/ask-the-inmate/how-can-we-get-verification-that-my-son-completed-his-ged#answer
Accepted Answer Date Created: February 25,2016