My Gimp workflow heavily involves Inkscape for that reason. If you need shapes, curves, text, moving stuff around, even scaling and rotating, Inkscape is much better. It’s only when I actually have to edit something in an existing image that I open Gimp. And sometimes when I need a complicated guideline, I’ll create it in Inkscape, export to png, import in Gimp, just so I don’t have to use the shape tool.