Staring at my gamepad right now, says no gamepad found.

Is it a directinput or xinput gamepad? In case it's an older model that uses directinput I can recommend x360ce.

I know this is an old thread but maybe this will help someone eventually. I have a set of generic SNES gamepads I ordered off of Amazon, specifically these ones. They work great but Evoland wouldn't detect them. After doing a bit of research I stumbled across an answer that ended up working well for me. Maybe it will for you as well, random internet person.

1. Open the folder containing Evoland.
2. Locate the file Evoland.exe, right click on it and open Properties.
3. Click on the Compatibility tab. Under that tab turn on the "Run this program in compatibility mode for:" setting and set the option to Windows 7.
4. Below that option, click on the option to "Run this program as an administrator."
5. Repeat steps 2-4 for the file pad.exe.

This worked for me. Might work for you. It should work regardless if you use GOG Galaxy or run it on its own since you're changing the settings for the source files.

Hello from the future! this has worked for me and I am very grateful!

This allowed the game to recognize that a gamepad exists, but I am unable to actually program it to do anything. (Windows 10 Home). After multiple attempts both here and on the Steam forums (using that version as well), I'm not sure anything can be done for Win 10 users, The devs aren't updating anymore and, sadly, GOG's mission is no longer "every game works, always."