Ghostscript is available in an open source AGPL version and a commercially licensed release. The links below will direct you to pages where you can select and download the appropriate version of Ghostscript for your needs.
PostScript and PDF Interpreter/Renderer.Download
PCL (5 and XL) Interpreter/Render.Download
GHOSTPDL SOURCE 9.21
For customers who license all Ghostscript product variants, you may download this single archive and conveniently get all versions with one download.Download