Aside from neopoints, the game also gave out healthy food items and supplements that could be fed to the pet. In the early days of neopets, this game was a very good game to get neopoints.
The game is referenced on the default petpage of the Lupe: "Did you know that us Lupes need constant care and exercise? If not, we'll become very lazy. So get us to Grundo's Gym as fast as you can!"The game was taken offline some time ago and has not been reopened since. The page returns an error and states that the gym is offline for maintenance.
The lifetime membership cards can still be purchased in user shops but serve no purpose until the gym comes back online.The gym could be found at [http://www.neopets.com/games/grundosgym/grundosgym.phtml http://www.neopets.com/games/grundosgym/grundosgym.phtml