it appears like you have a misconception about paths (or i am getting you totally wrong)
a path is something you make in GIMP with the path tool
it is saved in the paths tab - there you can turn it on or off
when turned on, it is red, when two or more paths are turned on, the active one will be red and the other one(s) blue
a path is not visible in a merged down picture unless you stroke it
it is like a selection - a selection will not be visible in a saved picture as well
for the most control it is best to stroke your path on a seperate layer, so that you can delete it, without destroying the whole picture
and you can merge down that layer, like any layer
the path is only visible in your final image if you stroke it, but you cant save the path in a jpg or png
you can save the path in an xcf file
so if you stroked the path, just merge down your layers and save it in whatever format you like (e.g. png or jpg)
but this is just standard procedure for any picture, with or without paths
Attachment:
Stroke Path.png [ 98.05 KiB | Viewed 1872 times ]
as usual bredies, all these questions could be answered a lot easier if you told us what you are actually doing and attach the picture