The winner of the Ladies Order of Merit had a slow start on the first day when she shot 77, with just one birdie but she fought back strongly on the second day.
She overtook the defending champion Aditi Ashok (75) and Tvesa Malik (74). Gurbani's round of 70 included one birdie and three bogeys on front nine, but she had a stunning back nine, where she carded four birdies, including three in a row from 12th to 14th and another on 17th.
Gurbani leads at 147 while Aditi is one behind at 148.
Tvesa Malik (74-77) has dropped to third while Raksha Phadke (78-84) was fourth and Sehar Atwal (78-75) was fifth with Amandeep Drall (75-78) also tied at sixth.
