Judging by the picture, it seems you're using Tumbleweed. So am I and GIMP launches just fine here. Is your system up to date, by any chance? I believe your libgegl-0_4-0 is not up to date:

```
$ rpm -q libgegl-0_4-0
libgegl-0_4-0-0.4.44-1.2.x86_64
```