For money orders,
Western Union tends to have service centers around the world, money transfers are fast but they usually have to go to a named individual. Plus, there is a service fee. Then that would need to be converted to a blank money order. Then, there is the time it'll take to get that in the mail over to GLG.
If GLG would take a Western Union transfer directly that would be the fastest. But, I kinda doubt they'd be keen on that.
It takes a week sometimes to just get the mail over to them. And that's stateside! And, priority, too.
Lot's of logistics that need to go perfectly on a short timeframe.