template.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "Name": {
      "type": "string",
      "metadata": {
        "description": "Input the virtual machine name"
      }
    },        
    "Size": {
        "type": "string",
        "defaultValue": "Standard_DS1_v2",
        "allowedValues": ["Standard_DS1_v2", "Standard_DS2_v2", "Standard_DS3_v2", "Standard_DS4_v2", "Standard_DS5_v2", 
            "Standard_DS11_v2", "Standard_DS12_v2", "Standard_DS13_v2", "Standard_DS14_v2", "Standard_DS15_v2",
            "Standard_DS1", "Standard_DS2", "Standard_DS3", "Standard_DS4",
            "Standard_DS11", "Standard_DS12", "Standard_DS13", "Standard_DS14",
            "Standard_GS1", "Standard_GS2", "Standard_GS3", "Standard_GS4", "Standard_GS5",
            "Standard_F1s", "Standard_F2s", "Standard_F4s", "Standard_F8s", "Standard_F16s",
        ]
    },
    "User name": {
      "type": "string",
      "metadata": {
        "description": "Username for the Virtual Machine."
      }
    },
    "Password": {
      "type": "securestring",
      "metadata": {
        "description": "Password for the Virtual Machine."
      }
    },
    "windowsOSVersion": {
      "type": "string",
      "defaultValue": "2016-Datacenter",
      "allowedValues": [
        "2008-R2-SP1",
        "2012-Datacenter",
        "2012-R2-Datacenter",
        "2016-Datacenter-with-Containers",
        "2016-Datacenter"
      ],
      "metadata": {
        "description": "The Windows version for the VM. This will pick a fully patched image of this given Windows version."
      }
    },
    "dnsLabelPrefix": {
      "type": "string",
      "metadata": {
        "description": "Unique DNS Name for the Public IP used to access the Virtual Machine."
      }
    },
    "gatewayKey": {
      "type": "securestring",
      "metadata":{
        "description": "gateway key"
      }
    },
    "open gateway port": {
      "type": "string",
      "allowedValues": ["Yes", "No"],
      "defaultValue": "Yes",
      "metadata":{
        "description": "Do you want open gateway port (8050)?"
      }
    },
    "Create new VNET or use Existing":{
      "type": "string",
      "defaultValue": "existing",
      "allowedValues": ["new", "existing"]
    },
    "virtualNetworkName/subnetName":{
        "type": "string",
        "metadata": {
            "description": "VNET name and its subnet name"
        }
    }
  },
  "variables": {
     "templatelink": "[concat('https://raw.githubusercontent.com/xiaoyingLJ/CreateGWVM/master/',parameters('Create new VNET or use Existing'),'vnet-azuredeploy-vm.json')]"
  },
  "resources": [
    {
      "apiVersion": "2015-01-01",
      "name": "[concat(parameters('Name'), 'Template')]",
      "type": "Microsoft.Resources/deployments",
      "properties": {
        "mode": "incremental",
        "templateLink": {
          "uri": "[variables('templatelink')]",
          "contentVersion": "1.0.0.0"
        },
        "parameters": {
          "Name": {
            "value": "[parameters('Name')]"
          },        
          "Size": {
            "value": "[parameters('Size')]"
          },
          "User name": {
            "value": "[parameters('User name')]"
          },
          "Password": {
            "value": "[parameters('Password')]"
          },
          "windowsOSVersion": {
            "value": "[parameters('windowsOSVersion')]"
          },
          "dnsLabelPrefix": {
            "value": "[parameters('dnsLabelPrefix')]"
          },
          "gatewayKey": {
            "value": "[parameters('gatewayKey')]"
          },
          "open gateway port": {
            "value": "[parameters('open gateway port')]"
          },
          "virtualNetworkName/subnetName":{
            "value": "[parameters('virtualNetworkName/subnetName')]"
          }
        }
      }
    }
  ]
}