How to use quantumresistant Ciphers

This is only for reserch for my bachelorthesis, i am totally aware that the result of my experiment is not (yet) safe to be used. nobody can access this gitlab instace except myself, and it will never be used outside of reseach.
I would like to know how i can enable quantumresistant Ciphers on gitlab.
is there a way i can achieve this without changing sourcecode? if not where do i have to make changes?