You just have to get an action replay then get the Pokemon shiny code and all of the wild gyrados will be red.
Keep using an old rod for an shining magikarp then evolve it. It should work
to get a red gyrados you have 1% of finding a red gyrados and you have to use a super rod to find a red gyrados.
red gyrados is just shiney gyrados use the shiney code and find gyrados
The Red Gyrados drops it. If you already fought the Red Gyrados, you should already find it.
at the lake of rage
Actually there is no red Gyrados. I mean there is, but a red Gyrados is a shiny Gyrados.
I presume it's in Gold, Silver, HG or SS. If so, no. You cannot catch (Storyline) Red Gyrados if you run away. However, any shiny Gyrados is a "Red Gyrados", just not from the storyline.
beating / catching the red gyrados in the lake
Gyrados's shiny color is red so if you ever find a shiny gyrados or magikarp catch it. Also at the lake of rage you can catch one that is already red.
you find a red gyrados at the rage lake
probably because there's a low % chance that you can find shiny Pokemon in any grass I heard its like 0.01 %
Two ways By Luck Action replay
Gyrados's shiny color is red to get a red gyrados is very hard it takes 8000 chances or so to see it keep finding gyrados until its red.