There is a boot option in Fedora 'inst.gpt' which forces the Fedora 26 Anaconda installer to recognize a drive as a GPT drive for the purposes of the Anaconda installer setting up the drive with a GPT partition table.
https://rhinstaller.github.io/
Could this somehow be added to Ubiquity as this option is useful for anyone who wants to set up a drive on a BIOS-based system as a GPT drive without having to manually partition the drive after manually setting it as GPT? It makes the automated drive setup (e.g. encrypted LVM setup) very easy and painless.