Any step which takes ground from your opponent.
Gaining
Gaining on the lunge. When the lag foot is brought up into the guard position from a lunge rather than the lunge being "reformed" backward to it's original guard position. Often used when preparing for another lunge.
Garniture
Group of armours decorated en suite comprising of field, tilt, and occasionally horse armour. Matching objects.
Gauntlet
An armoured or padded glove intended to protect the hand and wrist from attack. 
Giganti, Nicoloetto
Sixteenth century Italian master and author of Treatise on fence (1606) which first clearly described the elongated thrust, or lunge.
Glide
Thrust in the line of engagement that maintains pressure while sliding down the opponents blade.
Glissade
Flowing attack on the blade, executed from an engaged guard position, that displaces the opposing blade by gliding down the opposing weapon, foible to forte. 
Goat's foot lever
Simple but ingenious arrangement of levers to span a crossbow of medium power.
Golden Age
(Of Swordplay) The peak of the sword's evolution from the introduction of the rapier in the sixteenth century to the swords eventual demise in the eighteenth. 
Grand Lunge
Offensive action which replaced passing as a means for reaching ones opponent in an attack. The extension of the sword arm followed by the lead foot's advance as far forward as it can comfortably manage whilst the lag straightens behind it.
Grapple
To wrestle or get to grips with ones opponent in the fashion of a wrestler.
Grasp
To seize your opponents sword arm or hilt, as referred to in the sixteenth and seventeenth century.
Grasping the blade
A seizure of your opponents blade with the intention of disarmament.
Grassi, Giacomo di
Sixteenth century Italian master, who defined the lines of attack. He favoured the point as opposed to the cut as the chief means of dispatching ones opponent.
Graze
A coule along the opponents blade.
Grip
a/ The method of holding a sword. b/ The part of a sword situated between the guard and the pommel.3/ (Film) The technician responsible for handling set and lighting equipment.
Gripes
Techniques of swordplay which favor the locks, holds, grips and throws of wrestling.
Ground Judges
Two judges that look for hits made on the ground at electrical foil and epee.
Grype
To wrestle or grapple at close quarters.
Guard
a/ A position from which a combatant can initiate an offensive or defensive action. A placement of the blade that closes one or more lines and allows the fencer to attack and parry whilst expending the least amount of energy necessary. b/ The hilt of a sword.