A wonton (also spelled wantan, wanton, or wuntun in transcription from Cantonese; Mandarin: húndùn [xwə̌n.dwə̌n]) is a type of dumpling commonly found in a number of Chinese cuisines.

This poster said they be dumpling and thanks for your link which confirms that-as above.

Guo Tie are also dumplings but as you will know if you want Guotier, you just say' gei wo guotie' without mentioning dumplings.