Can a Atheist get insurance against Acts of God?

Nope, the minute you ask for insurance against "Acts of God" you have admitted there is a God and are no longer an atheist.

Sure. "Acts of God" is a legal idiom referring to natural events, even though rare.

You bet. Insurance providers are not biased against any religious affiliation or lack there of.

in current laws acts of gods are exceptions to insurance claims.

If you don't believe in God why would you need insurance against acts of God?