Ada OpenGL bindings, how to use them with gnat ?

[fab102@bluemail.ch (Karim)]

Hello 

I`m very new to Ada and I know that I first have to improve my ada
programming skills, but I want to know how to use the opengl ADA
bindings with gnat.
I looked on the web, but couldn find much ressources. 
There is the ada opengl project page on sourceforge, but  no manual
"how to use it" or how to programm a first simple glut window. There
isn`t also an example on the nehe page .None
Question : 

1. Does anybody used the bindings with gnat ? How, and on which OS ? 
I use FreeBSD and X Window. 

2. I simple source would be nice, to build a first simple app.

3. Are there ressources for ADA opengl (Howto`s , Tutorials) ??? 

Greetings 
fab