I would love to make a plugin for GM:S but first I need to address some issues.
The biggest problem with using Spriter and GM:S together is the way GM:S works with external images. When you add an image dynamically in GM:S it adds a new texture page to the resources. Which means if you import ten images, you've created ten texture pages. That causes memory to spike.
Then say you're drawing all ten of those sprites to render your skeleton, that results in ten texture swaps every draw upda