Gibor is one of the Armanen runes

Armanen runes

The Armanen runes, or Armanen 'Futharkh' as Guido von List referred to them, are a row of 18 runes that are closely based in shape on the Younger Futhark...

 devised by Guido von List

Guido von List

Guido Karl Anton List, better known as Guido von List was an Austrian/German poet, journalist, writer, businessman and dealer of leather goods, mountaineer, hiker, dramatist, playwright, and rower, but was most notable as an occultist and völkisch author who is seen as one of the most important...

 in 1902 (published in his 1908 Das Geheimnis der Runen

Das Geheimnis der Runen

Das Geheimnis der Runen is a book by Austrian mystic Guido von List, in which he presents his "Armanen Futharkh".It appeared as a periodical article in 1906, and as a standalone publication in 1908.-Contents:...

).

There is no historical Gibor rune (the name may be based on the Anglo-Saxon Gyfu

Gyfu

Gyfu is the name for the g-rune in the Anglo-Saxon rune poem, meaning "gift" or "generosity":The corresponding letter of the Gothic alphabet is g, called giba. The same rune also appears in the Elder Futhark, with a suggested Proto-Germanic name *gebô "gift". J. H...

 rune). Its shape is similar to that of the Wolfsangel

Wolfsangel

The Wolfsangel is a symbol. It is also known as the Wolf's Hook or Doppelhaken. The upright variant is also known as "thunderbolt" and the horizontal variant as "werewolf"....

symbol.

List associated his Gibor rune with the final stanza of the Rúnatal (stanza 165 of the Hávamál

Hávamál

Hávamál is presented as a single poem in the Poetic Edda, a collection of Old Norse poems from the Viking age. The poem, itself a combination of different poems, is largely gnomic, presenting advice for living, proper conduct and wisdom....

, trans. H. A. Bellows):

An eighteenth I know, / that ne'er will I tell

To maiden or wife of man, [lacuna]

The best is what none / but one's self doth know