NB! It seems this console command is not compatible with CS2.
Command Profile

SV_SHOWTAGS

CS:GO

This command prints to console the current server's public and private gametags.

Syntax
sv_showtags

Description

This command prints to console the current server's public and private gametags.

How To Use sv_showtags

  1. Enable the developer console in Counter-Strike settings.
  2. Open the console with the tilde key (~).
  3. Enter sv_showtags, replacing bracketed arguments with the value you want, then press Enter.

This legacy command is not currently listed as compatible with Counter-Strike 2.

Syntax And Arguments

sv_showtags