According to Hinduism, God is one and that is the Supreme God (Param Brahman) with limitless divine power and formless. According to Bhagavad Gita, Lord Vishnu is the Supreme God and Lor Shiva is the Supreme in Shiva Purana. So basically, there are three main Gods in Hinduism and that is Lord Brahma(Creator), Lord Vishnu(Preserver), and Lord Shiva(Destroyer).