There is no such word as "gayism".
The word "Gay" originally means "beautiful" according to all official English dictionaries.
The discrimination of homosexual people is called homophobia, not gayism.
You turn Gay?
It's important to note that being gay is not something that needs to be overcome. Sexual orientation is a natural and normal part of human diversity. Embracing and accepting oneself as well as supporting equality and diversity are key to promoting understanding and inclusivity for all individuals.
Johnism and ismism are both very popular in Japan. Johnism is all about john and ismism is all about the isms in the world. It includes isms like monotheism, catholisism, gayism, etc...