correction. it was not gundam but some mecha anime with emphasis on swords. forgot what it was called but every time a robot lost a limb what followed was a fountain of fluid accompanied by a spraying sound.
That sounds like Neon Genesis Evangelion to me (did those mecha have cables connecting them to the base?), but in that series the mecha were not actual robots, but a bio-organic construct that's esentially a cloned alien, implanted with technology to enable Humans to controll them. But beneath the robot-looking armor they are actual living beings, including some form of consiousness, so the red fluid actually is blood.
In some Gundam series (though not the first one) you occasionally (or rather very seldomly) see some fluids leeking from damaged or destoyed mobile suits, but it's obviously not blood, but rather some lubricant or hydraulic fluid. The Banshee destroying the Delta plus in Gundam Unicorn episode 5 comes to mind here.
Either way, the only ships were it would make some sense if they bled instead of burning would be the Cordi ships, since they at least look semi-organic.
If race specific damage animations are ever going to be possible it would be a nice touch. Cordi bleeding, Nordera belching ridiculous amounts of smoke, Fura'ngle leaving a trail of small crystals...