The snippet of a Cloud Formation template, which supports input of boolean parameter and using it for a resource with Boolean property.

Cloud Formation boolean Parameter

{
  ...
  "Parameters": {
    "DbRdsMultiAZ": {
      "Type": "String",
      "Description": "Specifies if the RDS instance is deployed in multiple Availability Zones.",
      "AllowedValues": [
        "yes",
        "no"
      ],
      "Default": "no"
    }
  },

  "Conditions" : {
    "DbRdsMultiAZCondition" : {"Fn::Equals" : [{"Ref" : "DbRdsMultiAZ"}, "yes"]}
  },

  "Resources": {
    "DbRdsLiferayInstance": {
      "Type": "AWS::RDS::DBInstance",
      "Properties": {
        ...
        "MultiAZ": { "Fn::If" : [
          "DbRdsMultiAZCondition",
          true,
          false
        ]}
      }
    }
  }
}