Perhaps Bodez is confusing Gauss with the special ability of Tyranid Gargoyles, who actually DO wound on a to-hit roll of 6 (and then have to roll to-wound for anything else). FYI, Bodez (and anyone else who doesn't know), Gauss weapons only auto-wound on TO-WOUND rolls of 6. It's so they can damage T8+ without needing to use a different unit.
...Is this an epidemic amonst Necron players, or are people just talking without having read...anything? The Necron played at my FLGS apparently claimed the same two weeks ago against my Nid-bro, and it's really too bad I was playing a game at the time, because apparently he used a lot of suspicious rules.
By which I mean blatant falsehoods. If he'd been playing me, or I hadn't been busy losing to some Deathwings, I'd have called him on all of that BS he was spouting.