- Gunnerkrigg Court - The site proper. Read all the latest pages Mondays, Wednesdays, and Fridays
- GC Forums - The official Gunnerkrigg Forums. Check out that Fanart thread!
- Tom Siddell's Patreon - Support the author by becoming a Patron!
- Gunnerkrigg Tumblr - Tom Siddell's Tumblr
- Gunnerkrigg Twitter - Follow Tom Siddell on Twitter.
- Archaia Press - Gunnerkrigg Court is published by Archaia Press, here's their official site for the comic.
- Boom Studios - Gunnerkrigg Court is now also published by Boom! Studios!
- Amazon - Buy the books on Tom's Amazon page.
- Merchandise - Want Gunnerkrigg merchandise? Check out the prints and t-shirts available at Topatoco!
- Chrysopax Consulting - A a fan-made search engine for the now-defunct Gunnerkrigg Formspring, containing questions answered by Tom.
- Gunnerkrigg Index - A searchable index of pages tagged by characters/locations/themes
- Gunnerkigg Court on Tvtropes - The comic's Tvtropes page. This website, though not the article itself, may contain mildly mature content.
- Gunnerkrigg Court and Bridging the Annan on DeviantArt - Two unofficial fan art groups on the world's largest art gallery and community!
- Gunnerkrigg on Reddit
- Gunnerkigg Court on Facebook - An unofficial Facebook page run by a fan