BUR #38860 is pending approval.
create implication gigantamax -> dynamax
Gigantamax is considered a form of Dynamax. Here's a quote, taken from a Trainer Tips sign in Sword and Shield:
"The Dynamax phenomenon is caused by a special power that originates from within Pokémon, warping the space around them and making them appear far larger than they truly are. Some Pokémon also change appearance upon Dynamaxing. This particular kind of Dynamaxing is also known as Gigantamaxing."