All paperwork associated with a $1 million government grant to a private aero club - where the minister responsible is a member - should be made public, the state opposition has said.

Victorian Aviation Industry Minister Gordon Rich-Phillips is a member of the Peninsula Aero Club, which received the $1 million grant from the government's regional aviation fund.

Victorian Aviation Industry Minister Gordon Rich-Phillips. Credit:Paul Jeffers

Under grant rules, the money should be for public-use aviation infrastructure, criteria which critics say the club does not meet.

Mr Rich-Phillips has said the Tyabb club told him it was applying for the grant, but the decision to give it was made by the Department of State Development, Business and Innovation.