Re: Gnome's Land and 54 Gnomes Location- Secret in game

If you're on Xbox One and you are missing a gnome, load a private match of great white north and put it on the craaaaazzy! difficulty, play as the zombies and set the plant team to none.  Then check the second to last gnome (the one in the cave off the side of the cliff near the last garden) and you should be able to pickup the missing gnome.  That worked for me at least.