I admit i have never used gmail’s snooze feature, but seeing it now i agree it uses the same relative times.
However i still don’t find the dates (especially the “next week”) to be to my particular taste.
I almost never use 2 weeks as well, so may i suggest that instead of “2 weeks” we could add 7 days?
(i also think that adding too many entries would make the dialog look rather crowded)