frankthedm said:
In a way, yes. In its simplest form the GT system creates units of creatures based on overall EL. Combat is then resolved based on an opposed check based on the EL of the units fighting, but also depending on the type of action the unit is performing. In this system, PCs as effectively lumped into the EL, are assumed to be using resource (though it's not specified) and combat takes place normally. Naturally a group of high level PCs will bump the EL of a unit considerably, making it a unit that will win a battle in most instances.
You don't have to run it like this, as GT allows PCs to take so-called heroic actions where they can individually influence a battle. Note that this system is different from d20 combat. In this system, a character isn't casting a fireball, but he's instead making what's called a devastating attack. This gives the character a bonus on the opposed check depending on the area of effect of the attack. It's an abstract system that works well, but doesn't model d20 combat as well as most people would like.
GT includes a nice little spreadsheet that you can use to do a lot of calculations and other stuff with. There's nothing stopping you from running PCs as separate entities, but the nice thing about GT is that it handles combat between 10 or 10000 units equally well on the same system.
Hope that explains some of the system.
Pinotage
