Jiaozi, gyoza, potstickers or in Cantonese, gow gee are all the same thing. They're an East Asian dumpling with a filling of minced (ground) meat and/or vegetables, which is encased in a thin, chewy skin.
The version I have made is with minced (ground) pork with Chinese leaf (napa cabbage). I have also made the recipe with chicken thighs, where I’ve home-minced (ground) it in a food processor. The resulting jiaozi are pretty good, and I often use them in a Szechuan noodle soup.