We are trying to get a slideshow to work and developer has said we need the server to support GD library, how can I support GD library within my VPS at the xyz server? Thanks.
You can enable GD library via the root WHM of the VPS -> EasyApache. Just follow the steps leaving the default options until you reach the list of PHP Options. Press ctrl+F and you should be able to search for "GD" in the list of options. Just tick the option and click on the Save and Build button at the bottom of the page.