Cookie consent Vs Google consent mode

Hi Community,

We are a small business based in New Zealand and the New Zealand law doesn't have policies specific to cookie consent. 

We do not currently have a cookie consent banner on our website, but as per the latest updates from our head office we were considering to apply the Google consent mode.

From my understanding, we have to have a cookie consent banner (enabled by cookiebot or similar) on our website before we activate the Google consent mode, is this correct? Or is it the other way around?

Please advise.

Thanks

Anu