I do not compile anything in Windows but even in linux GEGL is a pita.
No gegl.exe in Gimp 2.10 however It was there in earlier versions, a Partha 2.9.5 has the file. Not much use. I tried side loading missing dll files into the gegl folder, spent an hour chasing dependencies without luck.
If you want to try stand-alone gegl you might be better off installing a linux in a virtualbox.
edit: an example in a Kubuntu 16.04 VirtualBox https://i.imgur.com/clACmNN.jpg using whirl-pinch with before / after images.
No gegl.exe in Gimp 2.10 however It was there in earlier versions, a Partha 2.9.5 has the file. Not much use. I tried side loading missing dll files into the gegl folder, spent an hour chasing dependencies without luck.
If you want to try stand-alone gegl you might be better off installing a linux in a virtualbox.
edit: an example in a Kubuntu 16.04 VirtualBox https://i.imgur.com/clACmNN.jpg using whirl-pinch with before / after images.