User blog comment:Kaido King of the Beasts/How Do You Kill Quincy Jesus?/@comment-5398287-20151212002139

I've read in a couple places online that MS screwed up the translation for Gerard's explanation: essentially, his power isn't just converting damage into growth increases, but instead that in this particular instance it did that. From what I can tell, his power is simply conversion - what and how exactly he can convert and if there are any limits will probably be explained in upcoming chapters, but for now I'm confident that it's not confined to simply getting bigger (because that would be boring as hell and the last two battles have had plenty of power variety from the bad guys in them - yes, even Lille). With this in mind, the method of defeating him would be, as you pointed out, the Nimaiya method - hit him with a lethal attack too quickly for him to register and thus use his conversion power. I think the ideal candidate for this would be good ol' Urahara - he's smart, he's fast, he's got the power, and most importantly he's got an unrevealed Bankai that is purportedly too dangerous for training purposes. Prime Schutzstaffel takedown material.

Personally, regardless of how his power plays out or what gets used to defeat him, I just hope Gerard doesn't go god-mode ranting like Lille did. He honestly seems like the bro-iest of all the Sternritter (along with Mask, who is so far the only Sternritter willing to leave his opponents alive, albeit battered, if they're not captain-level) and is by far my favorite among the Schutzstaffel. Here's hoping he maintains that personality until the end.