If you mean, "how do I unlock the Gym where he is", you have to go into the mansion and get to the basement. There you will find the key to open the Gym
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The 7th gym leader in fire red is Blaine in Cinnabar Island.To unlock The gym, u must go 2 the pokemon mansion,search the gym key in the basement.
takes you to island 1
after beating gym leader blaine
Blaine will give it to you after you beat him in the Cinnabar Gym
He gives you TM38, (Fire Blast). Good Luck!
Blaine. Cinnabar Island. South of Pallet Town.
The 7th leader is Blaine. He uses fire pokemon.
This TM is given to you by the 7th gym leader Blaine after defeating him.
Blaine (fire type user), found on cinnabar island.
Defeat the Cinnabar Island Fire type gym leader Blaine Defeat the Cinnabar Island Fire type gym leader Blaine
you unlock it same time u unlock 4 and 6.