I feel that ‘gender’ is probably a misleading term for the languages that have ‘grammatical gender’, it rarely has anything to do with genitalia. ‘Noun class’, where adjectives have to decline to agree with the class would fit better in most cases.

English essentially does not have decline adjectives, except for historical outliers like blond/e where no-one much cares if you don’t bother, and uses his / hers / its / erc using a very predictable rule. So no ‘grammatical gender’.