Total nonsense!
They are shepherd dogs merely refined from a bunch of nebulous shepherd mutts.
Please let’s stop this myth that GS are wolves. My God, Mals and Siberians look more like wolves but hardly ever anyone accuses them of being wolf hybrids.
There’s actually a Wiki article that claims that which explains why it’s not reliable “history”.
This is short but concise.
http://www.nsgsdc.com/breedhistory.shtml