How to add GD support to PHP on a Linux server with Plesk
Adding GD graphic libraries support to php on your linux server with Plesk is relatively simple.
First, log into your server using ssh to get to a command line prompt.
Second, type the following command to install a version of php with GD support:
Third, restart your web service with this command:
service httpd restart
That is it. Your web server is now runing php with GD.