These are my personal configs for CSGO in game and for practice.

There is nothing special, I just want to prevent to cases needing a backup.

Cheers.

You can't auto exec, the name is a community standard.

Locate the folder:

<Your computer location for Steam>/userdata/<your-user-id>/730/local/config/

Place the file autoexec.cfg with the name of your choice.

In the in game console type:

exec autoexec

Note: autoexec is the name of the file. If you change it, you will execute as exec <name-you-choosed>

You may load it in game just as autoexec.cfg or use it as resource for copy/pasting during practice.