Following the step for transfer your domain from Google Domains to Hostever.

• Sign in to Google Domains.
• Click the name of the domain you want to transfer.

• In the top left, click Menu   Registration settings.

• Under “Domain lock,” make sure your domain is unlocked.

• To the right of “Transfer out,” click Get authorization code.

• Select To a different domain registrar and click Continue, then sign in if necessary.
• Copy the authorization code and provide it to your new registrar.

Now, login your hostever account and go to domain transfer option.

Enter your domain name and Authorization Code (you already got from GoDaddy)
And complete your order.