The Commission had earlier said it did not feel comfortable going onto the gang's premises.
A gang advocate, Denis O'Reilly, said getting gang members to vote was a way of helping them become more law abiding.
RNZI reports O’Reilly praised the Commission for getting Black Power members registered at a meeting on a marae in Hawera recently.
"It's a symbol by the Crown that says, 'We care. Yes we will thrash you if you break the law, but we also want to engage with you'.
"So it's as symbolic as anything," Mr O'Reilly said.