If you are a developer working normally with a Mac keyboard, you know the problem when you have to work on a keyboard with Windows PC layout:
Suddenly you do not find important keys like @[]{}\|
Even worse: If you try use the Mac keyboard with the Windows PC, you suddenly see the key < and § swapped!?
I experienced exactly this issue: I've added a Windows PC to my setup and wanted to use my Apple Magic Keyboard withit. After installing Windows, I had the impression that it was nearly unusable to work with (mainly because I didn't know the Swiss German PC layout by heart and because the two keys < and § were swapped).
After a long web search I've come to the conclusion that there was no such thing to download which solved my problem... but Microsoft provides a tool called Microsoft Keyboard Layout Creator (available here) which can be installed on Windows 10 (after resolving .NET framework dependencies (see here)).
It's a rather good tool, but I had to realise that Windows does not support the alt and alt + shift combinations, which are used on macOS. This is why I had to use altgr (=ctrl + alt) and altgr + shift as a replacement for our beloved combinations.
This setup helped me to create the SG-Mac.klc and SG-Mac_S.klc custom Swiss German keyboard mappings for Windows. You can install above tool yourself, and use the *.klc files to produce the binaries I've published under releases.
The SG-Mac_S mapping (*.klc and corresponding binary sg-mac_s.zip) has the < and § keys swapped. This version should be used if you connect an Apple Keyboard to Windows.
The SG-Mac mapping (*.klc and corresponding binary sg-mac.zip) has no swapped keys. This version should be used if you have a standard PC keyboard (e.g. from Logitech) connected but you want to use the "muscle memory" from trained during your macOS time.
Please note: ATM this version has not yet been tested by myself, as I do not have a corresponding keyboard available.
With the keyboard mappings provided here, it is possible to find the relevant keys, but nevertheless our brain has to adjust. Instead of pressing alt + shift + 7 for a \ key, you will have to press ctrl + alt + shift + 7 (= one key more), or if your keyboard has altgr (right beside the spacebar), you can use altgr + shift + 7.
Download from the latest release page the desired binary, extract it's content and run the setup.exe. This will install the appropriate version for your system.
If you are not happy with it, you can uninstall it from the "Apps & Features" section in your Windows Settings. The app is called Swiss German - Mac Layout for Developers.
Even better, if you have ideas for improvements, please contact me.