Without the jar he loses the automatic defense. After that he is a dead meatGaara can make sand at will teleporting gourd is nothing much.
Minato teleport his jar elsewhere after that Gaara is useless
With his speed, FTG's range [Assuming Minato can touch him.
Mid-high diff Gaara, Rasengan isn't going through Sand shield and Minato cant even get close enough to gaara in order to actually mark him. Even if he did he has sand armor as a secondary defense? Its not an easy win due to FTG as an evasive tactic but I don't see Minato winning this.
Minato teleport his jar elsewhere after that Gaara is useless