Oh ok, I see what you mean now.
Let's go through the steps you took. You drew the stars in Inkscape. Save as SVG. Open SVG in GIMP.
Is that it? And now you see in GIMP that the blur is off-center?
I don't know of any issues that might cause this. But I'm gonna do a test. What version of GIMP are you using? Well, and also Inkscape. I'll be testing in Inkscape 0.48 and GIMP 2.6, and I'll be back shortly with results.
EditOk, it worked fine for me. But I wonder, in the Render Scalable Vector Graphics dialog, do you show the following (exept for dimensions):

In my test, I did not use paths, only ellipse shapes. Are your stars paths, or star and ellipse shapes? In the Render SVG dialog preview window, how do the stars appear -- as you want, or offset?
I do know that the GIMP's SVG rendering is far inferior to Inkscape's, and it's been my understanding that GIMP's SVG renderer cannot handle bitmap display. And a blur IS a bitmap dispaly, despite the image format SVG. (In Inkscape, blurs are technically filters, and filters are bitmaps designed to work within the vector environment.) I don't know if in recent GIMP versions, perhaps this has improved. But GIMP used to not display things like blurs at all, in an SVG opened in GIMP.
Also another thought. Does your image use layers? If you open an SVG with layers in GIMIP, the layers are lost. Or more precisely, everything is dumped into one layer.
But like prkos, I'm wondering what it is that you need GIMP for? If you plan to use GIMP to edit an SVG image, why not just do it in Inkscape? Or if it's something that Inkscape can't do, why not just use Inkscape File menu > Export Bitmap, which will produce a PNG version of your SVG file, which would be easily edited in GIMP, without restrictions.
Edit #2 -- In Inkscape, did you use Fit Page to Selection?