In cases where a project is no longer actively being maintained, SourceForge has in some cases established a mirror of releases that are hosted elsewhere. This was done for GIMP-Win.
Editor's note: Gimp is actively being maintained and the definition of "mirror" is quite misleading here as a modified binary is no longer a verbatim copy. Download statistics for Gimp on Windows show SourceForge as offering over 1,000 downloads per day of the Gimp software. In an official response to this incident, the official Gimp project team reminds users to use official download methods. Slashdotters may remember the last time news like this surfaced (2013) when the Gimp team decided to move downloads from SourceForge to their own FTP service.
Therefore, we remind you again that GIMP only provides builds for Windows via its official Downloads page.
Note: SourceForge and Slashdot share a corporate parent.