I have a simple model on blender an add a PNG texture. It looks beautiful on blender but when I export it to .X file for GG It does not open well in GG, usually the model is alright but the texture did not lay good on the model.

yes. my files

I'd be happy if someone can tell me how to export it to GG
I have more than 100 models to export to GG

Sorry to say this, but there's a lot wrong with that model that you need to fix before exporting it for use in gameguru.

Your geometry is all wrong, you have a lot of loose geometry and specifically a LOT of Ngons, Ngons are very bad and will cause no end of trouble. What is an Ngon you ask? An Ngon is a face that has more than 4 sides, this can cause warping and other issues in the model. When creating a model make sure all faces are either triangles or quadrangles.

That's why your texture doesn't go on it right, it doesn't know which face to add it to because where you should have a half dozen four sided faces, instead you have a single face with a score of vertices.

It'll take a lot of work to fix that model, it would probably be quicker to remake it from scratch.

Here's a video on how to model and texture a house in blender, it's one of the best i've found that explains how to make windows and doors etc, if you watch it and work the way he work you will easily avoid ngons.

Note how when he makes the windows, all four corners are always connected to the corner of another face, meaning all of the faces have a maximum of four sides, with four vertices.

Thank you as always you are always helps me.
I corrected some things and kept as 3DS And now it all works.

Now I'm happy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Also if you look on your picture, a little further down is a section called normals, there are three boxes there to display the normal directions, if you select the third one, then change the size slider up to about 2, it will show a light blue line projecting out of each face, this is showing the direction of the normals, you want the blue line sticking out on the side that should be visible for each face.

A couple of shortcuts:

To use Blenders automatic normal adjustment, in edit mode highlight everything and press ctrl+N, this will try to swap all of the models normals so they're facing outwards

Sometimes the above does't work, so switch on the blue normal direction lines as i explained before, then each of the faces that are the wrong way, right click them, then press W, a menu should pop up, find and select "flip normal", this will flip the normal direction of each highlighted face.

I have 100 models that I bought and on Blender and Wings 3D They open very good and to open them in GG I have to work so hard (3d is hard for me) why? the settings are specifically for GG or the import of GG is not perfect? in normal import it looks very different from Blender and Wings 3D and GG.

This is good practice, before* starting your model in Blender, on the N menu adjust the scale fields to blender to 100/100/100 in object mode, then while still in object mode with your cursor over the 3D view press ctrl+A and select scale from the menu, that will reset the scale fields back to 1, but keep it at the 100x scale for GameGuru.

Once you have set the scale like this DO NOT use scaling on objects in the object mode again, always scale in the edit mode, otherwise it messes with the overall scale.

Basically Gameguru works on a different scale to blender, 100 blender units is 1 Gameguru grid unit, by setting this scale you can now easily make models that conform to grid snapping.

* the reason i say to do this before starting your model is quite simply every time you scale in object mode it adjusts the overall scale, so if you do it after making an object it's difficult o get the right scale, as it may not be a factor of 100 any more.