It would likely be impossible to redirect google.com without either sparking a cyberwar or building something like the great firewall of China, quite possibly both.
Blocking is somewhat possible, but to redirect, they would have to forge google certificates and possibly also fork Chrome and convince users to replace their browser, since last I checked, google hard-coded it's own public keys into Chrome.
Technical details
I say blocking in somewhat possible, because governments can usually just ask DNS providers to not resolve a domain or internet providers to block IPs.
The issue is, google runs one of the largest DNS services in the world, so what happens if google says no? The block would at best be partial, at worst it could cause instability in the DNS system itself.
What about blocking IPs? Well, google data centers run a good portion of the internet, likely including critical services. Companies use google services for important systems. Block google data centers and you will have outages that will make crowd-strike look like a tiny glitch and last for months.
Could we redirect the google DNS IPs to a different, EU controlled server? Yes, but such attempts has cause issues beyond the borders of the country attempting it in the past. It would at least require careful preparations.
As for forging certificates, EU does control multiple Certificate authorities. But forging a certificate breaks the cardinal rule for being a trusted CA. Such CA would likely be immediately distrusted by all browsers. And foreig governments couldn't ignore this either. After all, googles domains are not just used for search. Countless google services that need to remain secure could potentially be compromised by the forged certificate. In addition, as I mentioned, google added hard-coded checks into Chrome to prevent a forged certificate from working for it's domains.