Have you tried setting it in Gimp's preferences. I think you can in input devices. Maybe if you check 'share tool and tool options between input devices' it will not change - you can change your pointer type there too
To ask for a change/addition to gimp you need to go to another site. Someone here will have the link to it.
To ask for a change/addition to gimp you need to go to another site. Someone here will have the link to it.