Yes, gram is in the scrabble dictionary

Gram Definition

noun

A metric unit of mass equal to one thousandth (10-3) of a kilogram. See Table at measurement.

Any of several plants, such as the chickpea, bearing seeds widely used as food in tropical Asia.

Informal A grandmother.

The seeds of such a plant.

Any of several leguminous plants (as a chickpea) grown especially for their seed.

abbreviation

; .