All of the examples in the Fujifilm courses depict X series cameras.
Thankfully, however, Fujifilm uses the same "operating system" for both X and GFX cameras.
For example, if you want to learn about white balance, the system is exactly the same for X and GFX cameras. Same for creating custom settings, using film simulations, going through the setup menus, etc.
Sure, there are some differences between X and GFX menu options, but no more than there are between the different camera models within the X system.
With that in mind, nearly all Fujifilm courses will apply to both X and GFX photographers, including: