Gimli was the son of Glóin, one of the former companions of the hobbit, Bilbo Baggins (Tolkien's chief hero in his first fantasy novel, The Hobbit). He was a remote descendant of Durin the Deathless, chief of the Seven Fathers of the Dwarves and ancestor to the Dwarven people to which Gimli belonged, the Longbeards. Gimli was of the royal line, but not close to the succession; he was the third cousin once removed of Dáin II Ironfoot, king of Durin's Folk, and the first cousin once removed of Balin, also one of Bilbo's former companions, and later Lord of Moria for a short time.
Gimli was introduced in the first volume of The Lord of the Rings, The Fellowship of the Ring, at the Council of Elrond Half-elven, which he attended together with his father to bring news of his home, Erebor (the Lonely Mountain). There they learned that Bilbo's kinsman Frodo now owned the One Ring, a Ring of Power forged and then lost by the Dark Lord Sauron. The Council decided to have it destroyed by casting it into the volcanic Mount Doom in Sauron's domain of Mordor. Frodo volunteered for the task, and Elrond chose eight people of varying races to aid him in his task — including Gimli. Thus, the Fellowship of the Ring was formed.
After the War, Gimli led a large number of Durin's folk south to establish a new Dwarf-realm at Aglarond, and he became the first Lord of the Glittering Caves. The Dwarves of the Glittering Caves, led by their lord, repaired much of the physical damage incurred during the War. Most notably, they replaced the ruined Great Gate of Minas Tirith with a new one made of mithril and steel, as well as improving upon the existing layout of the entire city.
According to the Red Book of Westmarch, after Aragorn's death as King of the Reunited Kingdom in Fourth Age 120 Gimli (then very old) travelled with Legolas into the West, becoming the first Dwarf to visit the Undying Lands. This stemmed from his love for both Legolas and Lady Galadriel.
Argonath RPG Member
Gimli, in the Argonath RPG community, is a Community Leader and developer based in SA-MP, and is also currently known as [R*]xcasio. He is second-in-charge of the development team working on SA-MP's scripts, after [R*]Ronnel. Formerly, the name Gimli was used by Mantis, a former Argonath developer who has since returned to his community.
Gimli is also a member of the Rock Stars Clan, which is mostly composed of Argonath Administration members.