It's worth pointing out that, in linguistics, grammatical gender can be seen as a specific type of noun class system. The term is mostly useful when talking about Indo-European languages where the feminine-masculine distinction is most prevalent

It's also worth noting that grammatical gender evolves over time. Originally, most Indo-European languages had the three classes of feminine, masculine, and neuter. But, for example, French's loss of the neuter class is pretty recent. We're also seeing modern efforts to drive these processes with, for example, the usage of the gender-neutral term "Latine" instead of "Latino" or "Latina".