Parent means IP as in Internet Protocol, not Intellectual property. The DNS for gnome.org resolves to 8.43.85.5, which lists Red Hat Inc. as the ISP. Indicating it's unlikely to be hosted by Fosshost.
Oh I see what you mean. Fosshost is unique in that they have a lot of arm64 metal floating around (maybe locked up in a DC soon?). They typically have offered it up for CI or distro build servers.
Redhat does not own (100%) of GNOME IP, there are many contributors. Also redhat is just a brand asset of IBM, so it cannot actually own anything.