How native speakers pronounce “tgz”

to another extra letter there i'm going to use a  command like this tar c to create the archive z   because i want it compressed the file name  is going to be pdfs.tgz and i'm including   all of the files in the current directory that  have the file extension pdf so if i hit return  

How to use the tar command: 2-Minute Linux Tips

you will often see people abbreviate the resulting filename extension as ".tgz" instead of ".tar.gz"

Introduction to the Linux/UNIX tar command