There is a classic saying in Dragon Ball called:Father Vic, adoptive father Wukong. Of course, this is a joke, not true. Why there are such rumors, let's uncover the secrets:
Vic's first sacrifice to the sky
Narba and Vegeta come to Earth for the first time, and Gohan is about to reach the end of his life, and Vic shields him from his mortal wounds. Gohan then super-evolved, directly breaking through the Saiyan limit and reaching the Super Saiyan 2 stage, and shouted, "My own father".
Vic's second sacrifice to the sky
Dragon Ball Super Vic was confused by Sharu Max and didn't really die, Gohan's Wind Fury value was directly full, and he once again super evolved into "Beast Gohan". From here, you can see how important Bick is in Gohan's heart.
In comparison, Goku is different. Goku died in front of Gohan during the Sharu chapter, but Gohan didn't break out, but said, "I'm really happy that I can avenge my father in person." The word happy is used very well, and Goku smiles with relief in hell.
From here, it can be clearly understood that Goku is not the first in Gohan's heart, but Bick is, which is why there is a saying that his father Bick, his adoptive father Goku.