To be honest, I saved my seeds in my Google drive or Google sheet all my seeds are place in there and it is easy to use and for me it is the safest place to store my seeds.
Well, you are a honest dumb. If I h.ck your Gmail I may access all of your accounts, if there is smth inside you could loose what u got.
An advice for you, keep your wallets at a safe place such as paper wallet, cold wallets etc.
What if he encrypt the document? Wouldn't that make it safe since you hack his gmail, you need axcrypt password?
Every layer of security that you add on top will make it harder for someone to crack.
Like you have a file with a random name, with a text inside and one of the lines is your seed. That's already a layer of security, no matter where you store the file. If you put that file into a password protected zip file that's another layer. Put that in a password protected cloud storage or email account that's another layer. Having 2fa on that account is another. You can also encrypt the file and so on.
There can be better or worse layers. Storing something online is always more accessible from anywhere in the world for you, but also more vulnerable.