The seventh gym is not actually in a city - it's in the Seafoam Islands, east of Cinnibar Island. You fight Blaine, who uses Fire-type Pokemon and was the former Cinnibar Island gym leader, but had to take residence in the Seafoam Islands after the Cinnibar Island volcano erupted.
It's in Kanto region.
At the top of pewter city in the kanto region
When you defeat the pokemon league, you get given a ticket that takes you to the kanto region.
In the Kanto region above Viridian City
well its on kanto region at vermillion city
a city
Kanto region north of saffron city. Next to the Pokemon center
Saffron city is in the Kanto region, which is not in Pokémon Ruby.
It is in the very North western part of the Kanto region.
I think it was Vemillion city in the kanto region
It is in kanto after you beat the Champion. Hope this helps? Thanks.
golden rod city is in the johto region and fire red takes place in the kanto region