No, it can't. I'm not sure what Potato Finder is referring to.
As for the GPX upload page, that finally went away. The functionality was turned off about a year ago, but the page was still there and confusing members for a long time after that, even though TPTB said the functionality wouldn't be coming back. After repeated posts in the forums and an email to contact@geocaching.com, they finally removed the non-functional page.
The Wherigo app allows you to import files through iTunes. I'm really not sure why they haven't done the same with the Geocaching app. That would seem to me to be a workable solution. I wonder if they even considered this. I'll go suggest it now to see if they'll consider adding this to the app.
Awesome. And if they're wondering why some of us insist on using GSAK to sort our caches... tell them to try it! There's NO comparison. The filtering and RegEx and Macro support, etc. It's definitely the tool of choice at our household.