I have my own scripts and docs that I have written for several GL iNet models, but I don't release them, as I don't want to support them. GL iNet changes too many things between their different router models. When they do an upgrade, they document almost nothing about what they change. There is no way that I would ever try to publicly maintain a tool for GL iNet.

If you search through old forum posts, you will find some posts on different tools that users have made available, but I would be surprised if any are kept up to date.