How is the word ‘gaseous’ pronounced?

There are different ways of pronouncing this word. Some people pronounce the ‘a’ like the ‘ay’ in ‘may’, ‘bay’, and ‘gay’. Others pronounce it like the ‘a’ in ‘ant’, ‘pants’, and ‘apple’. The ‘e’ is like the ‘i’ in ‘it’, ‘bit’, and ‘kit’, and the final ‘ou’ is like the ‘a’ in ‘china’. No matter how you pronounce the ‘a’, the stress is on the first syllable. The word, meaning ‘consisting of gas or gases’, can be pronounced GAY-si-es or GA-si-es’.

*The teacher told us that steam is water in its gaseous form.