BJP President Amit Shah has said the historic launch of the GST was an outcome of commitment to the country's federal structure under the leadership of Prime Minister Narendra Modi.<br/><br/>Congratulating the Prime Minister, Finance Minister Arun Jaitley and the state governments, he said the GST will not just bring in one tax across the country, but also give a big boost to the economy, reduce burden on citizens and help the poor immensely.