There are some package listings: - Packages itself (https://packages.gentoo.org/categories), - Maintainers (https://packages.gentoo.org/maintainers), - USE flags (https://packages.gentoo.org/useflags), - Architectures (https://packages.gentoo.org/arches). The proposition is: 1. Create the Licences listing (https://packages.gentoo.org/licences). 2. Create the per-licences pages (https://packages.gentoo.org/licences/MIT). 3. On the package page, at the "Package Metadata" section, at the "Licence" item, make the licences links.