Gladstone Gander is Gladstone's father.

He married Daphne Duck sometime between 1902 and 1920, and had a son, Gladstone. He has been shown to be absent from Daphne and Gladstone's birthday party in the "Sign of the Triple Distelfink", suggesting that he might have passed away around that time.

Either way, by the 1950s, when looking for Gladstone's next of kin, a man seeked for Grandma Duck, suggesting that both Goostave and Daphne had died by that time.