i don't think so. i don't think i ever saw grams express a measurement of a liquid.
The Gram is a measurement of weight since liquid has weight it "Could" be described in this way however the more usual way of describing a liquid in Metric is to use Litres,centelitres,millilitres.
If it is literally the 'Volume' of a liquid then you would use Metres2,Centemeters2,millimetres2
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