Hi there, if your still having an issue, gyms are not on generation 1 and 2. Gyms are on generation 3 and 4. You do have player gyms which you can battle for your team and claim for you team which can also give you tokens every 24 hours for the number of gyms you have Pokémon in. Once you add a Pokémon to a gym and do not wish to take down any more gyms just type this command /claim and press enter