@everyone..
I just realized all I had to do was add this to the model FPE file "transparency = 2" and bingo the glass works as required.
The image below illustrates the proper glass effect.
The earlier image that took me a good 30 minutes to create a separate glass entity and a separate building with no glass and then position the glass where it belongs was just not required.
Although they look the same, the new image only took the time required to add "transparency = 2" to the FPE file.
So much for banging around most of the day yesterday to solve the problem.
The dds file for the model was created in paint.net and the layer that contains the glass image was made transparent using the layer slider control to change the glass image layer from solid to semi transparent.
The additional "transparent = 2" command in the FPE files told GG how to handle glass.
Silly simple.
Windows 10,64 bit|AMD FX-6200 Six-core-3.80 Ghz |CPU PASSMARK 6,142 |Memory 10GB |NVIDIA GEFORCE GTX 660 SC |GPU PASSMARK 4,114