MULTIPLAYER?, help

How do I make a online multiplayer game with GM7

and you didn´t specify anything

If you honestly have to ask "how do I do this?", It clearly means you aren't ready.
You're going to need to know every bit of GML you can get your hands on, how to set up a connection, etc.

I've been using Game Maker for almost 2 years, and I don't even want to create a 3d game (too much work, and GM isn't good for 3D anyhow).

My advice:

1) Give up now. Go learn more.
2) Go to the Game Maker Community. Search for MMORPG Engines or something. you'll get like 10 different ones. You won't be able to understand them though, from the question you asked.

Sorry if I sound harsh, but that's the truth.

I agree with Soiyeruda; You'll need to know GML quite well, including learning to set up the connections, making sure everyone sees the same thing AT the same time. If it's a MMORPG, you'll need a server and a host.
Do not attempt this until you almost fully understand GML. If you still want to this in the future, go to the GMC, check out some examples, LEARN GML.

If it's an MMORPG, you'll need like three different server programs, a client, and knowledge of MySQL and PHP.

The three different server programs are so that you can divide the resource intensity among multiple systems or view errors in different fields in different programs.

The PHP is because no MMORPG can exist without a web site, and it'll have to be in PHP.



If it's a regular multiplayer game you'll have a fun time coding host recognition and syncing.

The GML code that assigns major variables and expressions is:

if nb=true
{
mg_is?speed=30
}
Online_Multiplayer=true

that should get you started with the template.

@Mr.Cintraks:
Lawl. Nice joke :P