Nope. By default in Gmod, superadmin is highest group and has access to all server and ULX commands.
We never wrote any command to give any other group full access like you ask because, well, you'd just be creating a mirror of superadmin, so, would likely inherit superadmin.
Xgui allows for much quicker editing of permissions though, and would be able to see your inheritance tree.
Also, we strongly recommend using all lower case group names. Many things can break down the line if you don't.