At the moment I don't have a wheel to use with LFS, so I thought that I could use my Xbox One controller, but it seems like it doesn't work.

Is it possible to use Xbox One controller with LFS?
Or would it be possible to add support for it?

Should work by plugging it in but if it doesn't, install the latest official Microsoft drivers for it. My DualShock 3 pad appears as an Xbox controller in Windows and works well in many games.

http://support.xbox.com/en-US/xbox-one/accessories/controller-pc-compatibility

My PC find the controller, but I don't get my Xbox One controller as an option in LFS.

Quote from ICS-FD :

My PC find the controller, but I don't get my Xbox One controller as an option in LFS.

Do you have any other controllers connected? Also, you should select "wheel" setting in the game when using a gamepad.

Hey.You need download and instal driver for xbox controler...i am using controler with LFS very well.

Driver : Click Me
or here : Click Me

I hope it will be hopefuly for you.

I use an X box controller... Actually it's a Chronus Max with a little USB thingee it plugs into.
You turn the controller like a wheel.