ummm, it won,t be "gasket goo bits",, that stuff is like "loctite" 515 master gasket,, doesn't solidify in the motor,
what you'll have is bits of silastic sealant,, all that crap is good for is sealing exhausts,
if in doubt,, pull it off and check,, even if you've got to take the pipes off,
although the oil pick up gauze is pretty good at protecting the motor
I spose the other thing you could do is use something, maybe a paddle pop stick split in half,, poke in the sump drain hole and wipe side to side and pull out and see what's on the stick, before taking sump off if you want,
might give an indication of what's on the bottom of the sump