Glutamine and GABA

I was wondering, has anybody taken glutamine and after a while experienced mood elevation and improvement of sleep?

I’m wondering if supplemental glutamine can increase GABA production to any significant degree, and if others have experienced this.

You know you could just take GABA, right? It works pretty well.

Things is, where I come from GABA is hard to find, and when you can manage to find it its expensive. Glutamine on the other hand is pretty cheap.