The Opposition tabled a private member's bill in April that focused on anti-bullying but it didn't garner government support.
NDP Leader Cam Broten says the government is letting down students who face barriers when trying to establish a gay-straight alliance.
The peer-support groups are meant to make gay students feel welcome.
Wall says schools are already required to create gay-straight alliances when students ask for them.
But Broten says the onus shouldn't be on students to create the groups and legislation would set a better standard.