TifaFF7Lockhart
Gaara beat Kimi-kun blaugh , who was really strong, plus, even tho Shino is strong and really smart, Gaara wouldnt let little buggies through his sand sheild... surprised Actually, Gaara was about to get killed by Kimimaru. If whatever illness he had didn't kill him at that time, Gaara would be dead.
And anyway, I think it depends on the time the fight would take place.
Obviously, it has to be before he and Naruto fight, because at that time, Sunagakure was betraying Konohagakure. Therefore leaf and sand would be against eachother. Or maybe they could've been chosen to fight against each other in the chuunin exams. Whatever.
So being at that time, I think Gaara would win. He didn't really listen to anyone so any theories on Shino making Gaara lose his mind would fail. And Gaara's will to kill, his unshaken decision to take lives, his love for death of others, his mercilessness(sp) and the fact that he doesn't think twice about otheres will no doubtly be of his advantage.
Unlike Shino, who is a Konoha-nin, will surely be taken aback by such psychoness behavior. We all know the shinobis of Konoha are goody-2-shoes. Sure, I believe that, if given the proper time or opportunity, Shino would find a way to put up a good fight, but at the time where Gaara is still the merciless killer we all love, he would kill him in a second.