Step-by-step – GCC 11.1 Installation in Debian Buster

Downloading GCC

3. 3. Downloading GCC 11.1

   Download GCC 11.1 Source Code for GNU/Linux

   GCC 11.1 Source tar.gz

   Downloading GCC 11.1 for GNU/Linux Systems

   Navigate to the 11.1.x Folder to Grab the Package.

4. 4. Extracting GCC 11.1

   Then to Extract GCC 11.1 Archive
   If it does Not Open automatically then Double-Click/Right-Click to Open with Archive Manager:

   
   Or from Command Line:

   tar xvzf ~/Downloads/gcc-11.*.tar.gz

   But if you are in Trouble to Find the Location on Terminal then See: How to Access Downloads Folder from Browser.
   Finally, if you are in Trouble to Find Out it on Terminal See: How to Access Downloads Folder from Browser.