I dont use the GG importer, believe me its much easier to use fragmotion or blender 4 that.
1.Download the model and put the texure files body01.png, head.png, m4tex.png with the ArmyPilot.fbx in one folder(name the folder 4 example armypilot)
2.Download fragmotion http://www.fragmosoft.com/fragMOTION/fragmotion_135.zip
3.Open fragmotion go to File-IMPORT and select the ArmyPilot.fbx
4.After importing the model, go again to File and then EXPORT, select Direct X(.x)
5.Name it armypilot.x and save it in the same folder where the 3 textures are, let fragmotion be opened, dont close it.
6.Move the armypilot. folder to the directory of your GameGuru, then- files/entitybank/user
7.Go to entitybank/characters and copy the fpe file from a character, lets say Combat Soldier.fpe
8.Paste it into the folder from your model, so files/entitybank/user/armypilot
9.Rename the fpe file in your folder to armypilot.fpe and open it
10.Edit the file , change all this
leave the texture line and the haseweapon line empty, the scale "50" is just a example, if the model would be 2 small in the test level try to set it at 70 later,save and close the fpe file.
11.Your folder with the model should look like this
Now u can use the model in game guru, in the editor go to new entity-user-armypilot the model is there
If u want all the animations that the model contains work 4 GG u have check the animation frames in fragmotion, thats why i told u dont 2 close fragmotion.
put the frames from the anims that u want to the fpe file of the armypilot
If u learned c++ and unity i guess u know what and how 2 do it, should be not problem 4 u.
Remember its only a example from me, the soldier would not be shoot at u cuz he needs a hand-bone and a weapon added.
All the other fbx models from clara.io i wanted 2 open in frag doesnt work, the pogram crash.
U can use blender 4 that Jill model from mixamo, same concept as with frag but blender needs extra an x export plugin installed.
Maybe seems difficult but isnt, i done that all in less as 2 min.
Let me know if u have any problems