For a login system, you need a server with the capacity to receive and respond the GD requests you make (e.g. through PHP scripts), I’ve never done it in GD but in simple page-to-page request tests…
But ricardograca has shared a tutorial about GD-to-server requests, it isn’t about a login system, but is a good start point: [url]BAHAMUT95 : le come back] 