/usr/include/gdcm-2.4/ is in libvtkgdcm2-dev 2.4.4-3+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gdcm-2.4/vtkGDCMImageReader.h
/usr/include/gdcm-2.4/vtkGDCMImageReader2.h
/usr/include/gdcm-2.4/vtkGDCMImageWriter.h
/usr/include/gdcm-2.4/vtkGDCMMedicalImageProperties.h
/usr/include/gdcm-2.4/vtkGDCMPolyDataReader.h
/usr/include/gdcm-2.4/vtkGDCMPolyDataWriter.h
/usr/include/gdcm-2.4/vtkGDCMTesting.h
/usr/include/gdcm-2.4/vtkGDCMThreadedImageReader.h
/usr/include/gdcm-2.4/vtkGDCMThreadedImageReader2.h
/usr/include/gdcm-2.4/vtkImageColorViewer.h
/usr/include/gdcm-2.4/vtkImageMapToColors16.h
/usr/include/gdcm-2.4/vtkImageMapToWindowLevelColors2.h
/usr/include/gdcm-2.4/vtkImagePlanarComponentsToComponents.h
/usr/include/gdcm-2.4/vtkImageRGBToYBR.h
/usr/include/gdcm-2.4/vtkImageYBRToRGB.h
/usr/include/gdcm-2.4/vtkLookupTable16.h
/usr/include/gdcm-2.4/vtkRTStructSetProperties.h