Install the downloaded software with package manager.
sudo dpkg -i GlobalProtect_UI_focal_deb-6.1.1.0-49.deb |
If you encounter any problems during the execution of this command, it is possible that a certain module is missing from your computer, which must be downloaded (sudo apt-get install <certain module name>) and then use the previous command again.
sudo apt-get install <certain module name> sudo dpkg -i GlobalProtect_UI_focal_deb-6.1.1.0-49.deb |