What's not allowed is pre-checked opt-in. As France mentioned that's not the case for google. Only a default configuration is pre-checked. The opt-in is a separate immediately seen checkbox saying you agree to data usage for personalization etc. Along with a link explaining how to adjust.

Edit: I should say that this approach was deemed acceptable by Swedens dataskyddsmyndighet which is the government regulatory agency and is a common approach in many sites.