Windows Service?

I triying to make a on-line game, but i no have much experience on c++, and delphi.

I know that c++ is the best to make a game server.

Delphi is really good to make game server? Any one have experience developing Server application in Delphi? Using what component? or native way?

Is really compatible use GNet and Game Server maked in Delphi or C++?

Any aditional experience in concurrency and high amount of users connected to server, making a lots of operations?.