If it is expanded and that group is visible than it does select it.
If the group is not visible because the database is not expanded but folded, nothing happens. It does not expand the database to that group and select it.
Can it work in this case as well?
I would like the option go using cmd ctrl g to go to the group using just the keyboard. When I do this it does take me to that group and it is selected but does not have the keyboard focus. It would be helpful if it did. do you think that this is the desired behavior.
After going to the enclosing group (see Go menu) it should be selected in the main view which should have the focus. Or if you just want to rename the group, you could also use the Info inspector.