The deal, rumoured to be less than the $50m paid by Nine for Melbourne 2006, follows Seven recently announcing a triple play deal for the Olympic Games, through to 2022.
Seven also has all media rights for the event.
Seven Media Group CEO Tim Worner added: “We don’t just have television rights, we have all rights and by 2018 the way we consume those events is going to be completely revolutionised.”
These include free to air, subscription, online, radio, social media, mobile and HbbTV rights.
Kerry Stokes, the Seven West Media chairman, said: “We are going to be committed totally through the whole organisation to make the Commonwealth Games a success for Australia to showcase the Gold Coast, to showcase our athletes.”
80 per cent of the venues are already built, with Metricon Stadium to take centre stage and a $500 million Athletes Village at Parkland under construction to house 6000 people.
With TEN recently airing the games from Glasgow, Gold Coast 2018 marks the first Commonwealth Games on Seven since Manchester 2002.