Is this going to be a slide show ? (Rather than moving video, which needs 25 images per second)
Not much Gimp involved, although I would advise pre-scaling images and adding any padding ('pillars' for the sides or 'letterbox' for the top) I use BIMP to batch convert for this, if you need a linux version let me know.
Otherwise, it is import the files into Openshot, drag into the timeline in the order required, adjust duration and overlap for a simple fade between images.
Add your audio track, same thing drag into the timeline, adjust the length.
and here it is gone
Not much Gimp involved, although I would advise pre-scaling images and adding any padding ('pillars' for the sides or 'letterbox' for the top) I use BIMP to batch convert for this, if you need a linux version let me know.
Otherwise, it is import the files into Openshot, drag into the timeline in the order required, adjust duration and overlap for a simple fade between images.
Add your audio track, same thing drag into the timeline, adjust the length.
and here it is gone