Which toe is it?
My last dogs, aussies, both broke toes but later in life. Neither was splinted and both recovered fine. One had broken an outside toe on a rear leg and you could not tell after a couple weeks. My female broke a weight bearing front toe. It too healed up although oddly, she looked flat footed, but it really did not inhibit her.
I bet Gunner will recover quickly and you will be able to walk him in a couple of weeks.
Dutch Shepherd - Ptygo (Tee-Go) de las Flores
Rescue GSD - Freyja (Husband's Dog)