Natural gas is currently outside the ambit of GST, and existing legacy taxes. : The government should bring natural gas under the Goods and Services Tax (GST) regime to realise Prime Minister Narendra Modi's vision for a gas-based economy and raising the share of the environment-friendly fuel in India's energy basket, an industry body that represents the likes of Reliance Industries as well state-owned firms, has said. Natural gas is currently outside the ambit of GST, and existing legacy taxes — central excise duty, state VAT, central sales tax — continue to be applicable on the fuel.