Ask HN: Accessing company officer's commingled personal Gmail?

A key company officer recently passed away. They had fully commingled their personal and corporate correspondence in their personal Gmail.

Has anyone had experience/success interacting directly with Google on similar issues to recover past/ongoing correspondence and records?

To head off the early questions:

1. Yes, we worked hard to prevent this situation, but we're in it now.

2. Yes, we have extensive legal support/advice.