Well wouldn't you know water always finds its way in my cars, the ole PA was had an indoor pool for a while, lol
I removed the trunk lid liner and bam, I had 2 of 8 nuts on my wing.
So I cleaned the areas well, added Dynamat to quiet my wings rattle from the bass down, and I put silicone around all of the needed areas, wish I had the 2 gaskets they sell for it, but the silicone will do, I used some good stuff, almost went with the sikaflex..
I think I made a error on tightening it down.
I think I should have hand tightened all in a crisscross pattern, then let the silicone set an hour or two, then tightened them down a bit more, let it set, then a final tighten, that is the best way, but I think it will be good to go, I did crisscross when tightening.

Hmm looking for the gaskets just to link them here.

GM 10435827

Gasket-Rear End Spoiler Support2004-2007 Pontiac Grand Prix
""Manufacturer'* Notes
This part is discontinued. It is no longer available for purchase.""
FIGURES, lol


The gaskets listed for putting around the bolt areas is.
GASKET. Rear Compartment
Part Number: 10303312

Posting a pic also.. I'll look more for the parts later, at least this will let somebody else have a chance to see if they can still find the gaskets..