im playing on warlord difficulty and im still only making 15 or so gpt and im on turn 800...
If you're having those sorts of problems on Warlord (where you're getting massive bonuses), then the problem isn't the game. It's you.
No, I'm not trying to be cruel here, but you've apparently fallen into the same trap that many people have in their first game or two. If you're that short on money, one or more of the following has happened:
1> You haven't connected all of your cities to your capital with roads/harbors, and so are missing out on huge amounts of trade income.
2> You have too many units. Note that Workers cost just as much support as a top-end military unit, so while you might only have a standing army of six units, if you have twenty workers then it'll bankrupt you just as easily as if you'd had twenty combat units and six workers.
I did this in my first game. I never even realized how much they were costing me until I started disbanding the ones I didn't need. Once your empire is built, you really only need a handful of workers around since, unlike earlier Civ games, cities only grow one hex at a time. I've got a 12-city empire in my current game with only 4 workers.
3> You build every building in every city. Things like the Barracks, Armory, Stables, Forge, Harbor, Workshop, etc. will bankrupt you if you create too many of them. The same goes for +Happy and +Culture buildings; while the Colosseum might be a no-brainer, the more expensive ones (like the Theater) should only be built if you start to go unhappy.
Buildings ARE worth making. Just not every building in every city. This was a deliberate design decision by the developers, so it's not going to change.
4> You don't have enough cities for your Happiness. If you ever have +10 or higher happiness, you should start looking at creating a new city somewhere useful, unless you're going for a cultural win. Once a city reaches a decent size it'll pay for itself, especially if it's near something that generates money (a natural wonder, lakes, coastline, gold, etc.).
5> You've got all of your cities set to "Emphasize Production" or something similar. The AI takes that sort of order VERY seriously. Shift even one city to "Emphasize Gold" and you'll see a huge jump.
Again, if you're seeing that sort of financial crunch on lower difficulties, then you're going to have a horrible time on higher difficulties. So learn these skills now...
