Hello, I am impressed by the loving care you express for your son.

Yes, Lamictal is a mood stabilizer, but I don't know if it's used for children, if it's an appropriate medication for your son with the type of disorder he has, and I don't know if it specifically activates GABA. You can certainly ask your son's pdoc about Lamictal.

But please understand that there is no one on this forum who is qualified to answer your question. None of us know your son's exact situation or history, and none of us have the knowledge of psychiatric medication (especially for children) required to properly reply to you.

Best of luck to you and your son.