Neither. Volume is measured in:
Gas can be measured by volume (in litres), by mass (in grams/kilograms etc or, in chemistry a mole).
A gram is measured in grams. A kilogram is measured in kilograms.
Matter can be measured in either grams or kilograms or a combination of both.
kilograms
kilograms
grams
grams
grams
Grams
grams
Grams
grams