expression, i-adjective
gender-neutral; without gender distinction
Used to describe language, policies, or items that do not differentiate by gender.
この書類は性的区別のない表現を使っている。
This document uses gender-neutral language.
性的区別のないトイレが増えている。
Gender-neutral restrooms are increasing.
ジェンダーフリー is a broader social concept of being free from gender roles, while 性的区別のない specifically means 'without gender distinction' in a more descriptive sense.
Phrase composed of 性的 (sexual/gender-related), 区別 (distinction), and ない (not). The exact origin as a set phrase is uncertain, but it follows standard Japanese grammar.