Hi Roy welcome to you and your dog! As per previously in this thread, I thoroughly recommend Angie of K9 in Penkridge. She only takes one or two dogs, they live with her in the house, get to watch old black and white films and go romping on Cannock Chase.
There are very few people I would trust with my dogs (really just my husband, one friend and my stepdaughter) and she is brilliant. I dont worry about them when I am away and when I collect the dogs they are calm and happy, ready to slot straight back into their normal routine.
Before I found Angie I left them once somewhere a lot more expensive, that seemed fine when I visited beforehand. When I picked them up one of the dogs was really anxious. For a couple of weeks afterwards she was behaving really oddly, being excessively clingy, aggressive and even wearing in the house. She had nightmares so bad that I had to sit up with her. I thought I'd never get her back to normal.
Angie has always had GSDs and would probably love to meet yours.