There's a way to slide a text along a path to position it in the wished place?
In the image bellow GIMP has inserted the text at the middle of the ellipse, and the text asymmetric going toward its left.
The standard text-along-path puts the text left-justified on the path. When the path is a circle (99% of the uses) this is not a problem since the text path can be rotated around the circle center. But it's a major blocker for the remaining 1%.
There is however a script that does text-along-path but gives you more formating options (in particular, you can center the text on the path, which is what is required in most cases). This script is here.