Yep, there are many of those of different species-"mixed fruit tetras", "painted glass fish", painted parrots, etc. These are either injected or acid dipped and dyed (and I've heard have over an 80% die-off rate before they even reach stores).
Glo-fish on the other hand are literally the same technology as these mice. They weren't originally created for the money. It was originally for a water quality monitoring application. Zebra danios were good for a "canary-in-a-coal-mine" indicator for water quality in areas, then by making them florescent, it made them much easier to monitor in murky water storage canals. Then they figured out, if they made them different colors and sold them, they could make money, which I'm hoping is at least partly helping to fund further genetic research...