No, being gay does not determine one's religious beliefs or lack thereof. Sexual orientation and religious beliefs are separate aspects of an individual's identity.
People's religious beliefs or lack of belief are shaped by various factors, including upbringing, culture, personal experiences, and individual introspection. Some gay people may identify as atheists or agnostics, meaning they do not believe in any gods or are unsure about the existence of deities. Others may adhere to various religious beliefs, just like people of any other sexual orientation.
It is essential to recognize and respect the diversity within the LGBTQ+ community, including their religious or non-religious affiliations. Like any group, LGBTQ+ individuals have a wide range of beliefs and values, and making assumptions based on their sexual orientation can lead to stereotypes and misunderstandings.
It is always best to approach individuals as unique individuals, acknowledging and respecting their own personal beliefs and identities.