I think you missed a nice article pinned on this forum
You will have all the informations that you need.
There the link : https://www.clicshopping.org/forum/blogs/entry/9-gdpr-requirement-update-your-clicshopping-website/
Hello,
I am not specialist but on the blog you have 2 articles. Do you read it ?
https://www.clicshopping.org/forum/blogs/blog/2-e-commerce-general/
Just I know you must allow your customers to let a choice about different element like google analytics or make other things on the website like delete the account.