Making a scene
Is it possible making a scene using glados?
And is it possible using face poser to make glados move around and talk?
And is it possible using face poser to make glados move around and talk?
Scenes are impossible to implement without re-compiling the scenes.image file and/or have modding support. Of course this is impossible to do in portal at this current point in time, however you can get around this by using an ambient_generic, or something similar to play sounds.
Portal 2 uses animations not face-posing as face posing is done by moving and stretching meshes. You can see this thread how to create an animation using the SDK face poser for a core (though they actually play and create the animation/model through Garry's mod).
You could probably make the animations for GLaDOS and save them to a model, however creating and using the custom scenes in Portal... no.