Reknoc said:
Oh boy, Ganandorf's Castle doesn't have the 2 Gold Skulltulas that I'm missing. This should be fun.
The detailed map view will tell you where you're missing golden skulltullas.
The overworld areas can be checked any time you aren't in a dungeon.
Just use the dpad or circle pad to move the cursor from area to area.
If an area's name has a gold skulltulla icon next to it, you've found them all.
If it has a neutral dot-type icon, then there is still at least one there that you haven't found.
Similar functionality exists for dungeons with acquirable maps (all official dungeons as well as a few side-dungeons). The only caveat is that you have to be IN the dungeon to see if the skulltulla icon is next to the dungeon's name, or not.
FYI, there are NO gold skulltullas inside any part of Ganon's Keep, pre-barrier or post-barrier. There is one just outside it, but I think that falls under the "Market" skulltulla count.