By a gold Steelix I assume you're referring to a shiny Steelix. Shiny Pokemon are extremely rare, only 1 out of 8192 wild Pokemon is shiny.
In Gold, Silver, or Crystal, Steelix can only be found by trading an Onix holding a Metal Coat. You can get the Metal Coat from a gentleman on the S. S. Aqua after you've beaten the Elite Four. Wild Magnemites also have an 8% chance of holding one, if you can't wait until then. Trading an Onix with a Metal Coat is also the only way to obtain a Steelix in Ruby, Sapphire, and Emerald, in these games you can get a Metal Coat from wild Magnemites or Magnetons (5% chance), and you also find one in New Mauville.
The only way for your Steelix to be shiny, unfortunately, is if the Onix you evolve it from is also shiny. Onix are fairly common in GSC, and can be found in Union Cave, Victory Road, or Silver Cave, and also in Rock Tunnel once you get to Kanto. However, to get one in RSE you'd have to trade it over from FireRed or LeafGreen, look for them in Rock Tunnel and Victory Road. Good luck finding a shiny Onix!
give it to steelex or syther to evolve it when you trade
you use a rock plate on onix and lvl him up
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steelex does not evolve for it is a final evolve form of onix
Pokemon Heart gold is different from Pokemon Gold cuz heart gold has better graphics new Pokemon and new events
Pokemon gold johto
if you mean Pokemon gold then the answer is no and if you mean Pokemon haert gold then you can get him only with action replay
There is no pokeathelon in the original Pokemon gold
i don't know about a gold Pokemon but magikarp when it is shiny is gold
You can't trade Pokemon from Pokemon Gold to Pokemon Red, you can only trade Pokemon from Red to Gold and not the opposite.
gold pokemon #61 tadpole pokemon
No, Pokemon Shiney Gold is not free.