How do I import monero blockchain to GUI from a file?

So I downloaded the file from this guide.
https://www.getmonero.org/resources/user-guides/importing_blockchain.html

What are the steps i have to take in order to import it in my GUI wallet on whonix?

As per Free Support for Whonix ™ this question is more suited for the Monero support?

There shouldn’t be any difference in Debian vs Whonix since Whonix is based on Debian.