The BSE Sensex closed about 0.2% up at 80,718 on Thursday, extending gains from the previous session, buoyed by optimism after the GST Council approved a significant overhaul of the GST framework. Under the GST revamp, most goods fall into the 5% and 18% brackets, with items such as bread and paneer tax-free from September 22. Financials gained 0.5%, auto and consumer stocks rose 0.9% and 0.2%, respectively. However, market sentiment was tempered by caution ahead of the upcoming US jobs report and steady foreign outflows. Among the top gainers, Mahindra & Mahindra surged 5.9%, Bajaj Finance climbed 4.2% and Trent advanced 1.4%.