After reading a ton of bullshit here calling Foods Poo to be Gin... I have more serious candidates that could be him:
Smoke, lips, earrings, bushy hair, strong body...
Well, next one:
Similar mask, elegance outfit and strong body too...
And before you all say: "but if Kaido's son turns to be the horned bald dude from PH, why another broker will be with Kaido!?
Well... Easy, he could be an allied pirate captain (or CP0 member) with his own. Similsr to Whitebeard.
And regarding "Foods Poo" mask, it seems that his Devil Fruit make him blind or something and that's why he wears this mask who seems night goggles like soldiers have.