I have an image that I need to split up into multiple smaller tile pieces. Each tile piece should be in its own layer. While I could manually create each layer, this would take a very long time, considering I'm working with almost 100 small tiles. If it helps, these tiles are square and of constant size (16x16 pixels).
I thought the guillotine tool from this question might help, and while it does cut along the guides, it creates new documents for each tile piece.
Is there a tool built-in to GIMP similar to guillotine which allows me to cut the image in-place into layers? I'm using GIMP 2.8.22.
Here are 2 images describing the process I'd like to replicate with a tool (the layer names are irrelevant).