Gauss weapons are horrifying devices that can strip a target down molecule by molecule and reduce it to its constituent atoms in a matter of seconds.
Against troops, any roll to wound of a 6 automatically causes a wound regardless of Toughness. Even a target which the weapon could not normally hurt because of its high Toughness or because it is immune to weapons below a given Strength is wounded. Saving throws apply as normal.
Any vehicle that suffers a hit from a gauss weapon will suffer a glancing hit on a D6 roll of a 6 on the Armour Penetration roll, even if the target's Armour value is greater than could normally be penetrated. Note that a roll that beats the target's Armour value by rolling a '6' doesn't cause a glancing hit as well as a penetrating hit.
If a gauss weapon inflicts a glancing hit on a vehicle against which only glancing hits are possible, for example, a hull down vehicle, a vehicle screened by smoke launchers or one protected by a kustom force field, then a glancing hit is still inflicted. If a gauss weapon scores a glancing hit on a vehicle with a roll of 6 when it would not otherwise be able to damage it, and the vehicle is one which treats glancing hits as penetrating hits, such as the Hellhound, then it remains a glancing hit.