On pricing link: https://about.gitlab.com/pricing/
there are only 4 price categories: Free, Bronze, Silver, Gold
But in tiers: : https://about.gitlab.com/handbook/marketing/product-marketing/tiers/
there are 8 categories
We want to take features from Premium tiers. For what version we have to pay?
There’s 4 tiers for self-hosted instances and there’s 4 tiers for on-the-cloud (gitlab.com) which makes it 8 in total.
In that page you linked to, try switching to the self-hosted tab and you’ll see the 4 tiers: Core, Starter, Premium, Ultimate. The 4 you listed (Free, Bronze, Silver, Gold) are for the cloud solution (gitlab.com).
You might want to pay close attention to this section of the page: https://about.gitlab.com/handbook/marketing/product-marketing/tiers/#distributions-ce-and-ee