I am very sorry that your Gigi is missing. What happened? how long has she been gone? i'd definately put up posters, and go to Craigs list. Sometimes people will post when they find A dog. Call or go to all the local animal shelters in your area .
The thing about Yorkie's is that they are sooo friendly and cute that someone may have just kept her. Do not lose out hope though, and try everything possible to get her back.
