How long can I use the course once I pay for it? Academy Support August 05, 2015 15:36 Follow For as long as you need it! Once you purchase a course in the GNS3 Academy, it is yours to keep. Related articles Can I get a certificate of completion after finishing the course? How do I get help from the instructor? What payment types does the GNS3 Academy accept? Comments 0 comments Article is closed for comments.