Hi
I have 3 striped, 1 albino and one green tiger barb and they all school together. The green one plays nicely with the others, no prob. My LFS has the green and striped tiger barbs in the same display tank also.
Green tiger barbs look great schooling with the other ones!! I used to have a school of 3 regular, 2 green, and 2 albino (or gold) tiger barbs. They all hung out together and had a blast!! Now I have only one surviving green tiger barb, but it's hilarious because he now schools with my zebra danios. They don't seem to know he's different, and neither does he! I'm glad, cuz I was afraid he'd be lonely.