Tier 1 moves the job board off Google and onto Cloudflare, so it opens in a quarter of a second instead of three to five. The page moves; the data stays in Google. So the whole plan rests on one question. This page is already living proof of half the answer — it reached you by a git push: will a browser let a page on one website read data from another?
It starts with script.google.com/macros/s/ and ends in
/exec. Nothing is sent anywhere except to Google, from your own
browser, and nothing is saved.