Not if you install the technology properly and follow privacy guidelines, GDPR included. It’s worth noting there are several ways to install recommendation systems and make use of data. Not all of them rely on personal data.
Even if you’re using personal data in your recommendation system, the technology itself is relatively GDPR-friendly as it legitimately enhances the customer experience. As long as your consent system is GDPR compliant and you take reasonable steps to protect user and customer data, you shouldn’t have any problems.