Pass gateway parameters

GatewayOption[] gatewayOptions = new GatewayOption[3]; // the length of GatewayOption array should not exceed 255 characters;
       GatewayOption gatewayOption0 = new GatewayOption();
       gatewayOption0.name = "MerchantDefinedField1"; // the length of name should not exceed 255 characters;
       gatewayOption0.value = "merchant defined field value first"; // the length of value should not exceed 255 characters;
       gatewayOptions[0] = gatewayOption0;
       GatewayOption gatewayOption1 = new GatewayOption();
       gatewayOption1.name = "MerchantDefinedField2";
       gatewayOption1.value = "merchant defined field value second";
       gatewayOptions[1] = gatewayOption1;
       GatewayOption gatewayOption2 = new GatewayOption();
       gatewayOption2.name = "IPAddress";
       gatewayOption2.value = "192.168.1.1";
       gatewayOptions[2] = gatewayOption2;
       GatewayOptionsData gatewayOptionsData = new GatewayOptionsData();
       gatewayOptionsData.setGatewayOptions(gatewayOptions);
       Payment payment = makeElectronicPayment();
       payment.setGatewayOptionsData(gatewayOptionsData);
       ID paymentID = create(payment);
       soap message:

<?xml version="1.0" encoding="http://schemas.xmlsoap.org/soap/envelope/" standalone="no"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
 <soapenv:Header>
  <ns1:SessionHeader xmlns:ns1="http://api.zuora.com/" soapenv:mustUnderstand="0">
   <ns1:session>rmua7tSYGgQaDIYF2NCZlwAt1lcJgWxTFJt_KWQK3BYPydy9Yc4H5v5XA1b8SeBwdT1Wb-f5eDsV5mFUVaTDkw-TlOughj3B8BUjR15hd_S555UGQvP4jm32n0-7_qib26c5jIqKQIsruu_ayfoDYg==</ns1:session>
  </ns1:SessionHeader>
 </soapenv:Header>
 <soapenv:Body>
  <ns1:create xmlns:ns1="http://api.zuora.com/">
   <ns1:zObjects xmlns:ns2="http://object.api.zuora.com/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns2:Payment">
    <ns2:AccountId>402892b02eb705eb012eb713d2b20035</ns2:AccountId>
    <ns2:Amount>100</ns2:Amount>
    <ns2:EffectiveDate>2011-03-15</ns2:EffectiveDate>
    <ns2:GatewayOptionData>
     <ns1:GatewayOption xsi:type="ns2:GatewayOption">
      <ns2:name>MerchantDefinedField1</ns2:name>
      <ns2:value>merchant defined field value first</ns2:value>
     </ns1:GatewayOption>
     <ns1:GatewayOption xsi:type="ns2:GatewayOption">
      <ns2:name>MerchantDefinedField2</ns2:name>
      <ns2:value>merchant defined field value second</ns2:value>
     </ns1:GatewayOption>
     <ns1:GatewayOption xsi:type="ns2:GatewayOption">
      <ns2:name>IPAddress</ns2:name>
      <ns2:value>192.168.1.1</ns2:value>
     </ns1:GatewayOption>
    </ns2:GatewayOptionData>
    <ns2:PaymentMethodId>402892b02eb705eb012eb713d4400038</ns2:PaymentMethodId>
    <ns2:Status>Processed</ns2:Status>
    <ns2:Type>Electronic</ns2:Type>
   </ns1:zObjects>
  </ns1:create>
 </soapenv:Body>
</soapenv:Envelope>