I have the same problem.

Another problem just came up with a new scenario I started today. The scenario states 11 human players and 11 AI in teams of 2.
And it plays that way solo. You only have access to the 11 civs selected for human players. But when posted as a GMR scenario then all 22 civs become available. Of course I already have a couple of players selecting the wrong civs and I have to ask them to change.

I know it's an old post but I have started a few custom games using custom maps from the steam workshop and it works well enough. Provided the mod states that it is multiplayers compatible and does not affect save games. You can find this info when clicking on the mod name while loading them.

The only problem I have found is that any city state placed by the modder will show on GMR as a ?? AI civ. If you leave the game on public access then you can be sure that a newbie will soon join as one of these city states.
This will crash the game for the last player before the offending newbie. You then have to wait until he leaves the game but most of the time those settlers with 0xp never read their messages.

Yes count me in. Although I was playing a couple of games on GMR for a long time, I am now getting back into it more seriously.

You could have a look at http://www.enjin.com/
I used them before and is easy to use.

Ok then.. I'll have a 12 player GMR game where:
- 10 players are on Vacation Mode
- the Host and one other player are live and online at the same time.
- process the turns alternating between these 2 players and the 10 AIs for 10 turns. Since we are both online we can download/upload the saves rather quickly.
- Then ask the rest of the players to cancel their vacations and proceed with an advanced game.

I was thinking of using the Vacation Mode to speed up the early game.
1) every players take their turn 1 to settle and start research
2) every players except the Host turn Vacation Mode ON
3) In theory GMR should let the AI process the turn of all other players before returning the file to the Host.
4) The Host process his turn manually and save (slight advantage)
5) after 6 or 7 turns the players can revert to manual processing or let their Vacation Mode on longer if they trust the AI

This way the game should help have a more interesting play within a short time.
Any reason why it wouldn't work?