It certainly has German Shepherd blood but it is not a pure GSD by any means. Seems to have a bit of Belgian Shepherd in there too.
Overall it's a nice looking dog, feed it well and give it a good bath for God's sake and it will look a lot better than what it is right now.
Nice face and ears are held well, just enjoy it for what it is, if you don't want it because it's not pure etc then send it to me.
It should be a good dog for the family, also that would depend a lot on how it is kept and socialised. If you isolate it, it can be aggressive so let your kids spend plenty of time with it.
This is the top end of the age in which to aquire a dog, so if you want it then get it soon before it gets too fixed in any bad habits it might have.
Good luck and enjoy it. Should be a great companion, family dog and at the same time will give it's life for its family.