How long can I use the course once I pay for it? Academy Support November 15, 2017 18:30 Updated Follow For as long as you need it! Once you purchase a course in the GNS3 Academy, it is yours to keep. Related articles Where is the training on how to use GNS3? Can I get a certificate of completion after finishing the course? How do I get help from the instructor? Why can't I see my courses after I purchased them? What should I do if the lecture will not load/freezes? Comments 0 comments Article is closed for comments.