Northeast Pennsylvania? Not even the slightest hope.
If you wrapped it up every winter, you might get it to survive as a die-back shrub.

Would that even be possible? I mean, the soil freezes every winter...

Actually, some species are grown as dieback shrubs in places such as NH, OH and WI. E. neglecta and E. gunnii are two I have seen grown this way. You must mulch them well and cover as best as possible in winter and plant in a protected microclimate. Even then, there are no guarantees. Look up E. neglecta and you will see some examples.

very sad to hear this....i LOVE eucalyptus they grow like weeds everywhere in California. I thought that perhaps there were some super hardy species. I am looking up the 2 species you mentioned on the web. one looks like the silver dollar eucalyptus.

Mine have repeatedly overwintered in NJ/Zone 7 on the south side of the house. Mine was the globulus species--love those round leaves!--(Zone 7 plus may be the magic number with these.)

There is a guy on the tropicalesque forum growing a zone 7 palm in zone 4. He has an elaborate shelter he puts up for overwintering the largest of them, but it may be done, with plenty of effort. He is Miketropic if I remember correctly, on the Tropicalesque forum. He is in Utah. He has other tropicals he either covers or lifts in winter, but that large palm is permanently planted outside in a shelter. I looks great after the shelter is taken down in spring or summer. There are details about his shelter if you ask for him to tell you how he does it.

I know this is old but the Jounama Snow Gum from the mountains of Australia is supposed to be zone 6b hardy, I’d maybe protect it, there are also some zone 7 hardy ones but those might grow as a dieback shrub