Question31: Here is a partnership firm registered under GST. out of two partner one partner died .whether the surviving partner can continue business by taking a new partner. as a firm under the existing GST no. please guide me at the earliest.

Answer Please note that the registration in GST system is PAN based so always check whether the change in the constitution of any business results in the change of the Permanent Account Number, which requires fresh registration as per Rule 19(1)(d).
if there is no change in PAN then their is no need for fresh registration or new GSTIN .
Since in your case PAN of partnership firm remains same but only partners of partnership firm changed. So you Just do the amendment in core field by addition or deletion of Partner details on Common portal. (Reply dt. 03/4/2018)