The fourth gym at Pokemon fire red is grass type gym
The 4th pokemon badge is given by Erika the Celadon City Gym Leader.
The 8th Gym in Pokémon FireRed and LeafGreen is actually in one of the first towns you go to. The gym is located in Viridian City.
Victreebel♀ Lv29, Tangela♀ Lv24, and Vileplume♀Lv29
In Gold the fourth gym Leader is Morty. Morty specializes in Ghost type pokemon, and his gym is located in Ecruteak city.
Gym 5 is located in Safaron City, and the Gym Leader is Sabrina. She uses Psychic type Pokemon, and it's a bit of a puzzel to get to her.
The Fourth Pokemon Gym in Ruby is located in Lavaridge town. It is home to Flannery who specializes in fire pokemon. (just give them a good hosedown and take a swim in the hotspring)
Celadon city.
no
The fourth gym is located in Lavaridge Town,past Mt.Chimney on Route 112.
The fourth gym belongs to Morty in Ecruteak city. He's a ghost type gym leader. It is located north of Goldenrod city
The Fourth Gym is in Lavaridge City.