New Target.cs not showing up in Visual Studio

Hi, It looks like you are missing some information:

// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.
 
using UnrealBuildTool;
using System.Collections.Generic;
 
public class GameServerTarget : TargetRules
{
    public GameServerTarget(TargetInfo Target)
    {
        Type = TargetType.Server;
    }
 
    //
    // TargetRules interface.
    //
    public override void SetupBinaries(
        TargetInfo Target,
        ref List<UEBuildBinaryConfiguration> OutBuildBinaryConfigurations,
        ref List<string> OutExtraModuleNames
        )
    {
        base.SetupBinaries(Target, ref OutBuildBinaryConfigurations, ref OutExtraModuleNames);
        OutExtraModuleNames.Add("Game");
    }
 
    public override bool GetSupportedPlatforms(ref List<UnrealTargetPlatform> OutPlatforms)
    {
        // It is valid for only server platforms
        return UnrealBuildTool.UnrealBuildTool.GetAllServerPlatforms(ref OutPlatforms, false);
    }
 
    public override List<UnrealTargetPlatform> GUBP_GetPlatforms_MonolithicOnly(UnrealTargetPlatform HostPlatform)
    {
        if (HostPlatform == UnrealTargetPlatform.Mac)
        {
            return new List<UnrealTargetPlatform>();
        }
        return new List<UnrealTargetPlatform> { HostPlatform, UnrealTargetPlatform.Win32, UnrealTargetPlatform.Linux };
    }
 
    public override List<UnrealTargetConfiguration> GUBP_GetConfigs_MonolithicOnly(UnrealTargetPlatform HostPlatform, UnrealTargetPlatform Platform)
    {
        return new List<UnrealTargetConfiguration> { UnrealTargetConfiguration.Development };
    }
}

You can check out this information here:

Also extra help on dedicated servers I use is here:

Hope that helps!