As the source writes, Microsoft will complement the Windows 10 toolkit with a small application called Video GIF Capture, which will allow you to record the video interface and save it as GIF. The operating system has the ability to do this using the Xbox Game Bar utility, but it does not support GIF.
A separate utility will appear as part of the PowerToys update, which will save screen captures to GIF, but will not be able to convert video files to GIF. Instead, it will be able to cut out video clips and save files with different quality settings. The utility will allow you to save what is happening in the GIF to the active window or select any part of the Windows interface for capturing.