Books: Gaulish Celtic Studies:

• Ancient Fire: An Introduction to Gaulish Celtic Polytheism by Segomâros Widugeni: This is a go-to for anyone who is looking for a good introduction book to Gaulish polytheism.
• The Celtic Gauls: Gods, Rites, and Sanctuaries by Jean-Louis Brunaux: This book is a short, but a condensed overview of the Gaulish Celts and their culture.
• The World of the Druids by Prof. Miranda Aldhouse-Green PhD: She references some of the Celtic material from Britain and Ireland, but most of this text is about the Gaulish Celts
• Celts and the Classical World by David Rankin: He references some material from Britian and Ireland, as well as the Iberian Celts and the Galacians, but the bulk of the material is about the Gaulish Celts.
• Lady with a Mead Cup: Ritual, Prophecy and Lordship in the European Warband from La-Tene to the Viking Age by Michael J. Enright
• A Crane Breviary and Guide Book: Rituals for the Cranes of ADF, when they must kindle their own Good Fire by Rev. Michael J Dangler

Books: Gaulish Language Studies:

• Dictionnaire de la langue gauloise : Une approche linguistique du vieux-celtique continental (French Edition) by Xavier Delamarre
• Les noms des gaulois (French Edition) by Xavier Delamarre

Books: General Celtic Studies with Gaulish References:

• The Gods of the Celts by Prof. Miranda Aldhouse-Green PhD
• The Ancient Celts by Barry Cunliffe
• The Magic Arts in Celtic Britain by Lewis Spence

Books: Other Resources and Studies with Gaulish References:

• Our Own Druidry: Publication by Ár nDraíocht Féin: a Druid Fellowship
• Myths and Symbols in Pagan Europe by H.R. Davidson
• Roman Cult Images: The Lives and Worship of Idols from the Iron Age to Late Antiquity by Philip Kiernan

Videos: Gaulish and Other Resources:

• Cernunnos: Looking Every Which Way: by Ceisiwr Serith, https://www.youtube.com/watch?v=3Ap3LEcfVig&t=961s
• The Gaulish God Taranis: by Ceisiwr Serith, https://www.youtube.com/watch?v=233DWe89JRs&t=252s
• A Tour of the Nautes Pillar: by Rev. Michael J Dangler, https://www.youtube.com/watch?v=6lzpQzxTk6c&feature=emb_logo
• Toutatis -- known more commonly as Teutates: by Ceisiwr Serith, https://youtu.be/bS7Ukm7m3oc
  

Websites: Gaulish and Other Resources:

• Esus: by Rev. Michael J Dangler, http://www.chronarchy.com/esus/
• Cernunnos: Looking a Different Way: by Ceisiwr Serith, https://www.ceisiwrserith.com/therest/Cernunnos/cernunnospaper.htm
• Nemeton Segomâros; Gaulish Polytheism in the Woods of Florida: by Segomâros Widugeni, http://polytheist.com/segomaros/page/7/
• Epona.net; A Scholarly Resource: by Natonos and Ceffyl (non-ADF), http://epona.net/index.html
• Deo Mercurio: by Viducus, son of Briganticus (non-ADF), http://www.deomercurio.be/en/index.html
• Gaulish Personal Name Elements: by Rev. Michael J Dangler, http://www.chronarchy.com/essays/gaulpersnames.html
• Facebook Gaulish Polytheism Community (non-ADF): https://www.facebook.com/groups/162531797160858/