- 盖伦由Jamieson Price配音.
- 盖伦在新手试炼地（Proving Grounds）和 Ashe 与 Ryze同为三大免费英雄.（其实是永久免费）
- 盖伦的舞步来源于超级男孩（N'Sync）的MV《Bye Bye Bye》.
- 和大多数人认为的相反，盖伦只有在使用W Courage 才会大喊“德玛西亚”，而不是使用E Judgment或R Demacian Justice的时候.
- The phrase "Spin To Win!" originated from how easily some kills were obtained with Judgment, however this term has in many cases loosely referred to Wukong's Ultimate, Cyclone.
- 虽然盖伦不能从法术强度中获得收益, 他的大招 Demacian Justice, 却可以造成魔法伤害.
- 他的大招在Diablo II: Lord of Destruction 的mod,魔电（Median XL）里被提到, 是一把神圣的独特长剑样式.这把武器被命名为德玛西亚正义.
- 盖伦的笑话和嘲讽在公测时发生了变动,之前的笑话是“I'know you're in that bush"(我知道你在这个草丛，盖伦也曾被称呼为"草丛伦"
- 盖伦的第二个笑话来源于服装店Men's Wearhouse的广告, 他们的广告经常以以下的台词结尾： "You're gonna like the way you look. I Garen-tee it. Get it?"
- In his Dreadknight and Rugged skin arts he is holding his sword in his left hand, but in-game he holds it in his right hand.
- The Rugged Garen skin was originally called the "Vagabond Garen" skin.
- Dreadknight was a prize in a drawing from Spike's Game Trailers TV show, during an episode featuring Dominion. It was a drawing through Twitter, with only 100 skin codes released.
- Sanguine Garen is likely a homage to the Blood Angels of which their primarch (leader) is Sanguinius.
- Commando Garen is a reference to the Imperial Guard of the Warhammer 40,000 series.
- Desert trooper Garen skin has become a legacy skin to get re-released in special ocasions.
- Garen and Katarina first fought during a war between Demacia and Noxus. Garen has fought with her ever since, whenever the opportunity presents itself.
- Garen and Katarina were the ones who stopped the inter-city brawl in Kalamanda.
- According to Blitzcrank's "Fleshling Compatibility Service," a dating service made by Blitzcrank, Katarina and Garen make a perfect couple, but are not officially together. Fans have since been joking about their relationship.
- The sixth issue of the Journal of Justice states Garen's family name is Crownguard, and every member of his family has joined the Demacian armed forces. His father and mother, Marcus and Lilia, are officials of the legislative Demacian Council. His younger sister Lux joined the military when she was thirteen.
- Garen is a childhood companion of 20px Jarvan IV, the crown prince of Demacia.
- When Jarvan was captured by Noxian forces, Garen led his Dauntless Vanguard through enemy lines and rescued Jarvan before he could be executed.
- Garen once protected Katarina when she came to Demacia to protest about High Councilor Heywan Relivash's conspiracy in Kalamanda along with 20px Jarvan IV