Gaara is about 12 years old and he enjoys killing people that stand in his way (his way of having fun - he hates people and loves only himself). Long ago, when he was around the age of six, his father, the Kazekage, sent assassins to kill off Gaara because he believed Gaara was becoming too dangerous (after killing a man that passed him in the street). But the attempt failed, and later ninja's were sent...who were all killed by Gaara.
Yashamaru says that he is Gaara's mother's brother (that would be an uncle for all you slow people out there). He also tells us, as he is dying, that Gaara's father, the Kazekage (leader of the Village Hidden in the Sand, like Hokage is for the Village Hidden in the Leaves), ordered him to kill Gaara. Yashamaru admits that he could have turned down the mission but chose to do it. Yashamaru had "adopted" Gaara due to his obligation to his sister, but could never get over the fact that Gaara's birth resulted in his sister's death.
Gaara's father was killed by Kimimaro, then Orochimaru took his body and posed as him during the tournament.

Gaara's Name

In Japanese Kanji, Gaara's name is spelled "我愛羅". The kanji on Gaara's forehead, 愛 ("ai"), means "Love", and is the second kanji character is his name. The first kanji in his name means "self", and the third means "carnage". Thus, his name literally means "self-loving carnage". Additionally, before Yashamaru dies, he says that Gaara's name means "demon who cares only for himself". I'd say that matches up pretty good.

Gaara's Siblings

 It's no secret that Gaara has siblings, however, someone suggested that his siblings might not actually be his siblings at all, as apparently everyone in the Village Hidden in the Sand refers to each other as brother and sister, which could obviously cause some confusion. There is much evidence, however, that seems to show that the three are in fact siblings. First, in chapters 253 and 254, Kankuro is seen without his makeup and appears to resemble Gaara. Next, in a flashback scene, we see a burning photograph of Temari, Kankuro, Gaara, and the Kazekage. Both Gaara and Kankuro resemble Gaara's known father, the Kazekage, and Temari has the same hair color as Gaara's known mother, who was also seen in a flashback.

Also, in Naruto Shippuden episode 16, in a caring way Kankuro states "He's my little brother". Then in epsode 17 (exactly nine minues in), Temari is talking to Matsuri because she is wondering if it is really okay to do nothing why their Kazekage, Gaara, is out there somewhere and Temari replies "I know that! Gaara is my brother".
 
<3 Gaara's Age <3

I had conflicting reports of Gaara's age, some saying 12, some 14, and many saying 13. Thankfully, however, this mystery is over, as in Episode 58 (season 3) Gaara himself makes the statement "These past six years, starting from when I was six...". This would make him 12 years old in Season 3 and the Naruto Episode Guide backs this up.


I LOVE U GAARA ~~ from your love , Izathul