Gst registration

URGENT PLEASE .Can i apply for GST registration for residenial address which is other than my professional CA practice address? will there be any problem by the icai on this.This is because the relevant document required for GST registration at business address is not available.

Also being a fll time COP holder can i apply for both GST tax payer (although i am within limit) and GST practitioner. what is the benefit of having GST practitioner licensor with a CA practitioner?