Question About New GST Registration

1. Yes, but firm registration in your name would be required

2. Current telephone/Light bill and rental/consent letter of the owner.

 Refer: apply-new-gst-registration/

Yes you can register in your own name.

In case of proof for principle place of business, you should obtain no objection certificate for use of house premise for your business without rent ( in case of rentfree use of property)

if rent is paid to grandfather rent agrrement shall suffice

You said befor you sell in your name, So i assume youe are having proprietory business ( along with shop act lisence) in your name.

If not then you will have to obtain the lisence as registration of business in your name.