I think Google are more risk averse than most, which is why they lagged in providing AI access. This would be very risky and, I think, out of character.
... until its existence is threatened, by example by DoJ deciding to split it to many Baby Bells [0]
And what is Google's character? Honest question. I see an Ad company, tracking all internet users, even sensitive things like pregnancy [1], for profit (80% from showing ads).
PS: To clarify, I meant GPT4 for internal access. For Google lawyers, security, management, and likely for US Gov agencies. Definitely not public access.