Yep! Pretty sure it was the same breeder. I have a black female and a silver sable female from a litter born on October 21. Their dad is Wildwinds Rocky Boy and their mom is Rocking Y's Apache. Your Gemma is georgous. I don't know if yours share the same lineage as mine but they look very much alike. I also found them on Craig's List. Brooklyn, my silver sable was actually promised to me but inadvertantly sold shortly before I got there, so I took the last puppy, my black Shaeleigh. A few weeks ago Brooke popped back up on CL by the people who had bought her so I grabbed her.
If your's is only 4 months old they are obviously not the same litter as mine, but man they really look alike. Weird!!