No, there's nothing like that in Gravatar's identicon generation code:
This can be an interesting programming challenge, but I'm sure it's not yet implemented there.
Seriously now, while the Swastika itself is indeed officially forbidden, we can't possibly forbid anything that might remotely look like it. Where it ends?
As I advised in this other answer of mine recently:
If one is offended somehow by this or feel abused, they can follow the steps described in answers to Flag abusive users and ask moderators to reset the
location profile picture.
That said, if most other people won't find that picture offensive or abusive, there's a very big chance the flag will just be declined. One has the right to flag anything offending them, but please don't flag more than once.