I made the 360 spoof work in Windows 🙂
It requires to replace the stock 360 controller driver with the libusbk driver (winusb and libusb-win32 do not work).
This can easily be done using Zadig.
I built beta versions of the software and firmwares:
GIMX setup firmwares
(files removed since GIMX 1.10 is out)
This software cannot be used with older firmwares, and these firmwares cannot be used with older softwares!