So, a question: why? Just so that there is an alternative (not that there is anything wrong with that), or is there an issue with ImageMagick that discourages some people from using it?
[1]: http://opensource.graphics/christmas-is-already-here-for-ima...
I don't know what your standard is when it comes to software but by this point I'd expect a lot more out of what we have. I've experienced nothing but headaches with imagemagick. Have you ever tried to use it for rasterising a pdf? Forget about it.
The only other alternatives I'm familiar with involve 3rd parties and web based apis. If you want to perform image editing in an app, it seems like its the only choice.
I don't think this software is an alternative to imagemagick, but those are my thoughts on imagemagick since you asked.
Plus it comes bundled in with Krita and Gimp.
Just as a sidenote, if you like playing around with G'Mic, you might absolutely love Python+OpenCV+Numpy combination. It's crazy powerful for tiny amounts of code required.