So working in a blender you select objects in the outliner or maybe in 3d view
by clicking on them? :)
I mean that this is a solution but is it comfortable? search for the group on
the list?
I've done this shortcut and the work is more convenient. I wanted to share
this, so maybe it will be
Shift+G-Group will select group currently. It's pretty fast once
you do it first time since it remembers the group setting on menu for
subsequent selections.
I'd be hesitant to add this at this point because the whole keymap
redo project is show up soon. You can suggest it on that design task