Bhagavad-gītā does not propagate any type of mundane ‘religion’. Bhagavad-gītā describes consciousness and super-consciousness and their connection with each other, as well as the relationship that we have with the world around us, the laws of karma, the nature of the self, life after death. Why the living entity suffers in this world and how to break the bondage of birth and death. This point is answered in detail in Bhagavad-gītā Chapter 3 – Karma Yoga (The Yoga of Action) – Verse 14 and Anuvṛtti