Maybe in America? I can tell you in most of the world, nobody would even think to give a fuck about the name, it doesn't mean anything. The word "gimp" isn't even popular enough.
This sounds like some weird copium: surely the app would take off and replace Photoshop long ago, if they just changed that damn name! There was one fork that thought that, with a different name, died shortly after creation. Because in reality nobody cares about the name.