Just want to know if Game Creator has the capabilities to use a game pad and NOT just keyboard and mouse?
Yes (but with some quirks). We currently use Unity's Input System, which allows to map different key buttons to names. For example, the third-person camera perspective orbits around the player by default using the mouse's movement. This mouse movement is called Mouse X and Mouse Y.
These names are mapped to a particular scheme that can be modified under Edit -> Project Settings -> Input.
Bear in mind though, that each controller has its own key mapping. XBox Controller's map scheme is different from PS4's button scheme. You can google how these mappings work.
On the other hand, Unity is going to release a new Input system that will allow to streamline this process. Once this new Input system is stable and available by default, we'll support it.
Customer support service by UserEcho