Given I'm going to take a completely different approach that doesn't use anything proprietary, and non-competes aren't enforceable in California, I'd assume this is ok?
You should also be aware that as long as you’re an Alphabet employee (read: receiving WARN act salary payments) you’re still bound by any IP agreements you signed to start employment.
The non-compete isn't an issue but the "trade secrets" could well be. At the very minimum, make sure you and everyone who joins you is 100% clean for the past 12 months in terms of never transmitting or storing any work-related content outside of Google corporate devices/emails.
It will be ok, after you've spent millions in the court proving that it is ok. Shouldn't happen before you're a threat to them though, so maybe you'll have the money by then.