[Sword & Shield] Gigantimax Questions

[GriffinO1]

Does a Pokemon have to be in Gigantimax form when you fight it for it to be able to Gigantimax or just come from a max raid battle? Also, can children or grandchildren of Gigantimax Pokemon Gigantimax?

 

[Sheep]

You'll need to encounter the Gigantamax form itself in Raid battles in order for it to be able to Gigantamax, and from what I know, it can't be passed down by breeding sadly.