Listen...
Did this episode make me want to see Cordelia and Gunn together more often? Yes. Did it also make me wanna see them together romantically...? Also yes.
Also not sure when you'll be reading this and but Gunn is definitely about the same age as Cordelia. If anything, MAYBE just a couple of years older but I can't imagine it's more than like...typical final years of college age. Although I don't think it's ever directly stated.