[kybernetikos]

I'm not an expert but I have read the text. You should talk to an expert.

Having said that my understanding is you don't need consent if the information processed is not personally identifying. The gdpr text is also quite clear that consent is just one of a number of legal bases for processing pii and there are a whole bunch of provisos for relying on it (which are still ignored on most sites)

For your stats use case I think the best option would be to store and log anonymized stats that wouldn't be considered personally identifiable information. And then you shouldn't need a consent form.