An individual with gametic chromosome number is

An individual with a gametic chromosome number is a Haploid.
Haploid refers to the presence of a single set of chromosomes in an organism's cells.
A haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes.
In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diploid cells.