Comment 1 for bug 171228

I could easily implement this as a gimp script (in fact I've
implemented something very similar, a script to place 4
guides around the current selection bounding box) and this
sounds like an ideal think to implement if someone is
looking for an extension project.

Given the underlying problem you describe it would probaby
be a good idea to provideoptions allowing the page border to
be configured somewhere. i dont think there is a visible
preference for this but there may already be a configuration
file buried somewhere allowing you to change it