Well. You can pay for gas very low, but your transaction will take very long to process, and the transaction will likely fail.
You pay according to the current gas rate, your transaction will be processed faster. Only that!
Was going to ask same thing about Cosmic Commission then I thought he must be talking about gas fees,
There is no way to avoid paying gas except you can use a lower gas but don't expect your transaction to be confirmed soon, it could take days or weeks depending on the situation.