For a lot of them, yes.

However: There are some flavours that taste identical but come in different colors. Particularly the various shades of blue. At least 3 of them taste exactly like orange juice.

Red, white, orange, yellow, purple, and green all taste unique. Fruit punch, cherry, weird af orange, lemonade, grape (white or red depending on how deep the purple is), and granny smith apple.

I always found it weird that they have blue ones that taste like actual OJ, but the orange gatorade tastes like Tang or something orange flavoured but not actual OJ.