For documents that are true PDF with text and vectors then best not Gimp as previous, try LibreOffice Draw.
However, it might be that the document is a set of scanned pages that are just images anyway.
There is a plugin that will export a stack of Gimp layers to a multi-page PDF http://registry.gimp.org/node/27987 Read it and see what it says about a Windows installation.
1. You need the Windows version of ImageMagick installed This is the standard installer
https://www.imagemagick.org/download/bin...64-dll.exe
note IM is command line so after installation do not expect anything click-n-wish to work
2. As-per the plugin directions, you need to edit the Gimp file default.env to add the imagemagick path. To save grief with the poor Windows tools, I include an edited version in the attached zip file. Use that to replace the existing C:\Program Files\GIMP 2\lib\gimp\2.0\environ\default.env
3. The ImageMagick (V7) syntax has changed since the plugin was written. A small change to the plug-in (convert becomes magick), so use the version in the zip file instead of the plugin-registry version. The file export-layers-to-pdf.py goes in your Gimp profile C:\Users\your-name\.gimp-2.8\plug-ins folder.
Tested in Win7 64 bit and Win10 64 bit VirtualMachines and working there.
However, it might be that the document is a set of scanned pages that are just images anyway.
There is a plugin that will export a stack of Gimp layers to a multi-page PDF http://registry.gimp.org/node/27987 Read it and see what it says about a Windows installation.
1. You need the Windows version of ImageMagick installed This is the standard installer
https://www.imagemagick.org/download/bin...64-dll.exe
note IM is command line so after installation do not expect anything click-n-wish to work
2. As-per the plugin directions, you need to edit the Gimp file default.env to add the imagemagick path. To save grief with the poor Windows tools, I include an edited version in the attached zip file. Use that to replace the existing C:\Program Files\GIMP 2\lib\gimp\2.0\environ\default.env
3. The ImageMagick (V7) syntax has changed since the plugin was written. A small change to the plug-in (convert becomes magick), so use the version in the zip file instead of the plugin-registry version. The file export-layers-to-pdf.py goes in your Gimp profile C:\Users\your-name\.gimp-2.8\plug-ins folder.
Tested in Win7 64 bit and Win10 64 bit VirtualMachines and working there.