I agree. OP would not likely find anyone, airline or third party site, or TA, that would issue tickets for two flights with the second leaving before the first arrives. Not a legal connection time, to put it mildly. I still think the $800 quoted seems awfully high. And trying to convince Gol that you're simply checking in late because your first flight arrived late, but that it wasn't even scheduled to arive until severa lhours after the second flight left could be interesting. That assumes Gol can't figure out the OP's obvious intent. All in all, sounds risky to me.