1robin
Christian/Baptist
These are questions which have over lapping magisterium but are both equally in need of an answer but there might be an order requirement here. However both questions are not equal.Before you ask, "does god or the gods exist", shouldn't you be asking, "If god or the gods exist, then how would we know that they exist?"
Isn't the latter the more fundamental question? Why or why not?
Does God exist is an ontological question, where as how would we know is an epistemological question. However before we discuss those types of questions we need to get the order they should be asked.
It is impossible to answer how we would know if God X exists before we define what God X is like. Some types of God's are impossible to discover all together, some have a certain kind of evidence, where as others have another kind of evidence expected.
So please first qualify your questions by at least supplying the type of God you are asking for evidence of.
1. Are you asking about a personal God as in Islam and Christianity?
2. Are you asking about an impersonal God as in deism?
3. Are you asking about a God which is co-equal with nature as in Pantheism?
4. Are you asking about a certain God within many God's, as in Paganism?
5. Or how about a God which can take multiple forms including philosophy as in Hinduism?
Clarity is necessary before your questions can have any answers.