Gephi requires a certain format, involving two files (one for nodes, and one for edges). Palladio requires a different format, which just one file.
There is one sample for Gephi and one for Palladio that our client provided, up on Moodle. I believe these samples are minimal, and we should probably try to find out from the client whether there is more information/columns that should be included in these files.
I'm going to ask our client if she can give us a little more direction about this.