How to pull GST number for a Custom Report

I am trying to prepare a custom report where I want GST no of Supplier and Client on the report. How can we pull GST no.

Also GST & PAN no of the customers/supplier are not displayed in the individual view respectively

Please follow the forum rules at FAQ - Manager Forum more specifically [emphasis added]:

If your question is related to custom themes or custom reports, always post the code or report definition you have developed and the results it produces. Do not simply post a picture of something you want and ask other users to tell you how to achieve it.

I noticed that you asked for custom report support at Support required for creating Custom reports and where not told about these forum rules but they are there for a purpose!