Gundoald or Gundwald (c.565–616) was a Bavarian nobleman of the Agilolfing family, a son of Duke Garibald I and Walderada, and the Duke of Asti from sometime around 589.

When Childébert of Metz broke his engagement to Gundoald's sister Theudelinda, Gundoald removed to Italy with his property. In 588 Theudelinda was engaged to the king of the Lombards, Authari. The potential marital alliance with the Lombards sparked an invasion by the Bavarians' overlords, the Franks, in 589. There Theudelinda married Authari in May. Gundoald was invested with the duchy of Asti and the hand of a granddaughter of King Wacho in marriage. With her had two children, Gundpert and Aripert.

According to a Frankish chronicle, Gundoald became too popular with the Lombard nobles, so his sister and her husband plotted to have him killed. Gundoald was killed by an arrow in 616 while sitting on a stool defecating.