Let's see a simple example

```
s0 = Plot[Sin[x], {x, -10, 10}, Frame -> True, FrameLabel -> {"x", "y"}, 
       ImageSize -> 550];
E0 = Export["test.jpg", s0];
img = Import["test.jpg"];

S1 = GraphicsGrid[{{img, img}, {img, img}}]

```

and here is the output 

![enter image description here](https://i.stack.imgur.com/22x9Y.jpg)

Is there a way to delete the white areas that I marked in the `GraphicsGrid` result with red boxes? 

Many thanks in advance!