I assume you mean that you were using too many appliances at the same time and overloaded the 30amp pedestal breaker, if this is the case then you may have damaged the GFCI(they are normally only 15 amp) but you're saying you don't have any power to that outlet. How do you know you don't have any power to the line side of the GFCI. If you really don't have power to the GFCI, then there is either a switch or CB that is blown.
Take your meter and check both the line side and the load side before you go any further. If there is 120 to the line side and it will not reset, buy a new GFCI, if there isn't go the breaker and see if it is hot on both side, keep going till you find power and the last thing you checked without power is the problem.
