just so ya know in some 2D app's you can lay a grid over top the texture and move the texture to match the UVMaps.

I have never found a grid tool like that in Gimp.I've never really looked for it.
but ya might ask on a gimp forum.

============================================================ 

The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance