Ipfire vs Deutsche Glasfaser

Hello everybody,

in the near future my connection will be upgraded from DSL to Fiber (finally!). My Fiber Provider for the near Future will be Deutsche Glasfaser. Is anybody else using Ipfire on a Deutsche Glasfaser Connection? They dont offer a public IPv4 adress and i am wondering if i will have any Problems because of that. I am not hosting any services.
But what about Gaming?