It is pretty easy to get past the first gym leader. Just level up your starter to around level 12 or higher. If you wish, you can catch and train a second Pokemon for that gym, but you only need your starter for this gym. If you have a Chikorita, get a second Pokemon.
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The final gym is the Viridian City Gym. Blue is the Gym leader.
go past the cinnabar island and go the sefom island and he in there
Not enough info: which gym leader?
Blaine.
Blue, the last gym leader in kanto region
on Chamber Island
The eighth gym leader still awaits, as well as the whole of Kanto.
The orders of the gym leaders in Kanto are not set, so the 2nd gym leader could be almost any of them. However, if you are looking for Misty (Cerulean City Gym), she is on Route 25.
gem leader blue
You need to have defeat the other gym leaders of Kanto first, after that you will find Blue on Cinnabar Island, talk to him and he will return to his gym.
The Kanto Gym leaders are located all throughout the region. Most major cities have one gym leader. Make sure to look around for the gym sign. Very few cities do not have a gym leader.