In response to the discussion of whether or not gamepad aiming should be used for FM, I recorded a bit of me playing HL2 with my Xbox One controller. Even though I consider myself pretty good at gamepad aiming, I'd still rather have a Keyboard and mouse when I'm playing games on my PC. Here's the video. If it looks blurry, it's still processing.
4 hours ago, Ross Scott said:
Rewatch the Strife RGD if you want to see how it would look using a gamepad, I use it in one portion of that.
The difference with Strife and HL2 is that HL2 does have aim assist (from doing research it's more like Halo's bullet magnetism than snapping your crosshair on the enemy) on when using a gamepad, while Strife (Or GZDoom in your case) doesn't have aim assist. But even with aim assist, I still prefer using a keyboard and mouse like I said.