Although social acceptance of gender and sexuality diversity is growing in Australian society, in schools, visibility and inclusion of knowledge pertaining to those who are gender- and/or sexuality-diverse, such as lesbians, gay men and transgender people, remain marginalised. This may be due, in part, to a belief that parents are opposed to such content inclusions in their children's education; yet, virtually no Australian research supports this belief nor have parental perspectives on gender and sexuality diversity inclusion been specifically examined. This paper draws on a broader research study that examined New South Wales parents' perceptions about the visibility of gender and sexuality diversity and the inclusion or exclusion of related content in school curriculum. It focuses on one particular focus group comprised of only mothers who lived in a specific enclave of Sydney known for its gender and sexuality diversity. The discussion highlights their awareness of gender and sexuality diversity and the dynamics surrounding it; and their perceptions of local school approaches to, and limitations around, gender and sexuality diversity in school curricula, policy and practices, despite potential support for it.