It's simple in blender.
1. Enable .x export: File > user preferences > add-ons tab, then find on the list Import/Export: Direct X X Format (note it is actually only export, there is no properly working import for .x in blender yet), tick the box, then hit save user settings and close the window.
2. Select ALL objects in your model, you do this by right clicking one of the objects, then use shift+right click to select each of the rest
3. File > Export > DirextX (.x)
4. Name the file, choose your options (bottom of the tool menu on the left), click Export DirectX
Here's the first in a series of videos that details exactly ow to make models, uv unwrap, texture, export and import them into GG using Blender, i highly recommend watching the whole series.
https://www.youtube.com/watch?v=nPgQfd5bb4g
i5, NV960 2GB, 16GB memory, 2x 2TB Hybrid, Win10.
i3 , Intel integrated graphics, 6GB memory, 512GB Generic SATAIII Win8.1.
Intel Celeron (duel Core), Radeon integrated graphics, 4GB memory, 180gB Generic SATAII, WinVista.
Q6600, Intel integrated graphics, 8GB memory, 512GB Generic SATAII, Win7.