- This card's Bandai artwork is taken from Yu-Gi-Oh! Duelist Duel 37: "The Deadly Guardian!!", specifically from the panel showing this monster fully manifested after being Summoned, albeit with minor changes in detailing.
- This card is treated as a Ritual Monster in several video games, with "Gate Guardian Ritual" as its Ritual Spell Card and requiring its component monsters as Tributes.
- In Yu-Gi-Oh! The Falsebound Kingdom, this card is a Fusion Monster.
- This card is currently the only monster with 3750 ATK.
- This card's original ATK and DEF are each equal to half the combined original ATK and the combined original DEF of its three parts, respectively.
- This card was the first Level 11 monster to be released.
- This card has the highest original ATK of all Level 11 monsters.
- This card is one of several cards to lack a passcode.
- This monster has an anime-only counterpart: "Dark Guardian".
- In Yu-Gi-Oh! Duelist Duel 36: "The Terror of the Dungeon", Meikyû the Elder reveals in his thoughts that "Exodia the Forbidden One" used to be the only monster in Duel Monsters that could only be Summoned by "activating" several cards at once, until Pegasus created the three cards capable of Summoning "Gate Guardian": "Sanga of the Thunder", "Kazejin", and "Suijin".
- Despite this, in Yu-Gi-Oh! Duelist Duel 37: "The Deadly Guardian!!", Dark Yugi thinks to himself that this monster is simply three monsters stacked on top of each other, and proves to be correct when he wins the Duel by defeating it one monster at a time.
- In the "Ultimate Dueling Guide", this card is listed as one of the best cards in Metal Raiders, the set in which it debuted.
- When this card was first released in Japan, it was impossible to Summon, as its component monsters ("Kazejin", "Suijin" and "Sanga of the Thunder") had not been released yet.