Here's what I get (very quick lashup to demonstrate). First is the terrain rendered in GC2:

Now the Vue render from a procedural terrain using the 16-bit terrain height map exported from GC2:

As you can see, the terrains are almost identical apart from the artifacts in the top right corner in the Vue render (and the strange moire effects, don't know why they are there).

Edit: should have said that this is a 1024x1024 terrain, there would be better results with larger maps.

Steve