@ddljohn-- I don't think it's so simple. Hepatitis G is still a Hepatitis virus, whether it actually does damage or not.
I'm not an expert but I think that Hepatitis G might become active in the future and start causing damage. Or maybe it already is causing damage in ways we don't know about yet.
Hepatitis A also stays in acute mode, or inactive mode and doesn't directly cause illness either. But if you carry a virus, there is always a risk that it might become chronic or active later on.
Plus, Hepatitis G is rarely found by itself, it's usually found with another Hepatitis virus, either A, B, or C and we know that Hepatitis B and C can be dangerous.
So, to sum it up, it would not be right to infect HIV/AIDS patients with Hepatitis G. Scientist need to do much more research and studies on the interaction of the two.