"I recently came to the realization that one of the reasons I have not been able to shoot accurately with any consistency is that I haven't been holding the gun tight enough. I know this contradicts what some instructors teach but I have noticed that if I squeeze the gun really tight, I shoot more accurately.
That said, are there any types of shooting gloves available that make it easier to hold a gun tighter".
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Guns, are you referring to a rifle, pistol or shotgun? Need to be specific as to the type, they are like women, they are all different.
A very firm grip with a pistol makes a definite difference. You can put a death grip on a gun and still be a poor shot.
In all honesty, a glove is not going to increase your hand strength, your muscles define strength, A glove might help in being able to grip it better. Maybe a tool to increase your hand strength might help, but I doubt it.
Go back to basics and learn to shoot, that is the secret to shooting, no silver bullets exists to being a good shot.
Dry firing is the answer along with practicing.
Shooting is mental, nothing else.