格瑞特 is most often the Chinese rendering of Gretel — the girl from the Grimm Brothers' 《汉赛尔与格瑞特》 (Hansel and Gretel) who pushes the witch into the oven. The same characters can also transliterate Western masculine names like Gerrit or Garrett, and the surname Garrett.
memory
格 (gé, 'pattern' / phonetic 'ge') + 瑞 (ruì, 'auspicious' / phonetic 'rui') + 特 (tè, 'special' / phonetic 't'). 格...特 is a very common pattern for two-syllable Western names that begin with G- and end in -t (Garrett, Gerrit, Gerald → 杰拉尔德, etc.).