García II Sánchez called the Bent, was the duke of Gascony

Duke of Gascony

The Duchy of Vasconia , later known as Gascony, was a Merovingian creation: a frontier duchy on the Garonne, in the border with the rebel Basque tribes...

 from sometime before 887 to his death.

He was probably a son of Sancho Sánchez

Sancho Sánchez of Gascony

Sancho II Sánchez or Sans II Sancion succeeded his brother Aznar Sánchez as count of Vasconia Citerior in 836, in spite of the objections of Pepin I, King of Aquitaine.After Pepin's death in 838, confusion enveloped southern Gaul...

 or of Sancho Mitarra, though older sources give a genealogy with a Spanish origin.

His ancestry is, in the end, unknown. He may have been a cousin of Arnold

Arnold of Gascony

Arnold was the Count of Fézensac and briefly Duke of Gascony in 864. He was the son of Emenon, Count of Périgord, and Sancha, daughter of Sancho Sánchez of Gascony. He made his claim on Gascony on his uncle's death....

, who some sources claim acted as regent

Regent

A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...

 during his minority following his father’s death in 864 (if his father was Sánchez). Other sources place Arnold as Sancho’s successor and date his death to that same year. Whatever the case, García was in power by 887.

In that year, he appeared in a charter issued by the grandees of Aquitaine

Aquitaine

Aquitaine , archaic Guyenne/Guienne , is one of the 27 regions of France, in the south-western part of metropolitan France, along the Atlantic Ocean and the Pyrenees mountain range on the border with Spain. It comprises the 5 departments of Dordogne, :Lot et Garonne, :Pyrénées-Atlantiques, Landes...

 assembled at Bourges

Bourges

Bourges is a city in central France on the Yèvre river. It is the capital of the department of Cher and also was the capital of the former province of Berry.-History:...

 to decide on a course of action in the twilight of the reign of Charles the Fat

Charles the Fat

Charles the Fat was the King of Alemannia from 876, King of Italy from 879, western Emperor from 881, King of East Francia from 882, and King of West Francia from 884. In 887, he was deposed in East Francia, Lotharingia, and possibly Italy, where the records are not clear...

. In 904, he was using the title comes et marchio in limitibus oceani: "count and margrave to the limits of the ocean." García was the first of a line of dukes which ruled Gascony until 1032 and incorporated the county of Bordeaux into its demesne. García’s daughter Andregoto married one Raymond, who fathered William the Good, Count of Bordeaux. García divided his domain between his three sons by Amuna:

• Sancho IV inherited a rump duchy of Gascony with the ducal title
• William inherited the county of Fézensac (including Armagnac
  Armagnac (region)
  The hilly countship of Armagnac , in the foothills of the Pyrenées between the Adour and Garonne rivers, is a historic countship of the Duchy of Gascony, established in 601 in Aquitaine...
  
  )
• Arnold
  Arnold I of Astarac
  Arnold I García was the first Count of Astarac from 926.Arnold was the youngest son of García II Sánchez of Gascony and Amuna. When García died, his duchy was divided between his heirs. The eldest Sancho inherited Gascony itself, while the second, William, inherited Fézensac...
  
   inherited the county of Astarac
  Astarac
  Astarac is a region in Gascony, a county in the Middle Ages. It was formed as a county out of the partition of the Duchy of Gascony amongst his son following the death of García II Sánchez. The youngest son, Arnold I, received Astarac....
  
  
• Andregoto, married William the Good, Count of Bordeaux
  Count of Bordeaux
  The Count of Bordeaux or comes Burdagalensis was the ruler of the city of Bordeaux and its environs in the Merovingian and Carolingian periods. The names of the counts are scarcely known until the ninth century, when they start to take on a larger role because of their strategic importance in the...
  
  
• Garsinda, married Raymond III Pons
  Raymond Pons of Toulouse
  Raymond Pons was the Count of Toulouse from 924. He was the last head of his house to rule in Toulouse before the power passed to his cousins the counts of Rouergue....
  
  , Count of Toulouse
• Acibella, married Galindo II Aznárez
  Galindo II Aznárez
  Galindo Aznárez II was Count of Aragón , the son and successor of Aznar Galíndez II.Galindo was one of a coalition that sponsored the 905 coup d'état in Pamplona in favor of his brother-in-law, Sancho I of Pamplona. However, he turned on this new king and in 911 attacked him in concert with...
  
  , Count of Aragon

Sources

• Higounet, Charles. Bordeaux pendant le haut moyen age. Bordeaux, 1963.