How do I access components of gameobjects in a list ?

I wish to access the renderer of all the gameobjects that are getting added to my list together. Is it possible to do so?
I have to do this, so I can check if all of these objects have their Bounds intersecting with a different object.

So my comments still holds. For C#, the code might be:

foreach (GameObject go in instantiatedCrowd) {
    Bounds b = go.renderer.bounds;
    // Do your bounds checking here