1. Go here: http://www.ghostscript.com/download/gsdnld.html
Download the version of GhostScript GPL suitable for your computer. The public license column is free to use.
2. Install it.
3. If on a Windows computer click Start orb | then RIGHT click on Computer (or My Computer)
4. In the window that opens look in left pane and click on "Advanced System Settings"
5. In the window that opens click the "Environment Variables..." button
6. The next window that opens has two sections; use the TOP section !!!
6A. So click the 'New' button in top section 'Variables for user ... '
6B. Now in the "Variable Name" line type: GS_PROG
6C. Next click inside the Variable Value: and type: The path to the executable for GhostScript version you installed
Typically this path would be for example:
C:\Program Files\gs\gs9.07\gswin64.exe
If you were using a 32-bit version then C:\Program Files (x86)\gs\gs9.07\\gswin32.exe
7. Now just click OK or Apply till all windows disappear: reboot your computer
You should now be able to import AND export .eps files into GIMP