I assumed OP had more than 90,000 between Feb 06 and Aug 06, in order to go past Silver and get Gold by Aug 06. Then OP has until Aug 07 to get 60,000 miles to remain a Gold member. In that case, OP will be downgraded if not able to get 60,000 miles by then.

Here is how I feel:
* Aug 07 is still a few months away. It is difficult to expect the events in the next few months. It may be too soon to call MPC anyway.
* If MPC allows OP to remain Gold, that will be after OP's Sep/Oct travel, as already mentioned. OP may also momentarily drop from Gold to Silver until the qualifying flights are taken.
* If MPC grants that request, then the segments used for the renewal this year cannot be used for renewal/upgrade the next year.