Handling Gorilla3D is quite the same as using Firemonkey 3D. The main difference is the usage of TGorillaViewport as the main component for display. You can no longer use a TViewport3D or TForm3D as basis for showing 3D content.
The reason for that is, that Gorilla3D extends functionality a lot and needs special treatment, which the default viewport do not provide (f.e. Render-Passes, Lighting-Information, Shadow-Computation, …).
But, let's start and have quick look at the basic features of Gorilla3D and how they are going to be used.