"I" is only sorta gendered - "watashi," the "feminine" form, can also be used by guys, and I know a girl who regularly uses "boku," the male form, though that's uncommon. And you're not necessarily going to be using the first person pronoun much anyway - it's not needed as often as in English. So yeah, it's possible to write something in the first person without revealing gender if you're careful.
(An example (spoiler for all of Yokohama Kaidashi Kikou): For the entire series, we never get any indication of what Owner's gender is, including through his/her letter(s).
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Date: 2009-03-07 12:43 am (UTC)(An example (spoiler for all of Yokohama Kaidashi Kikou): For the entire series, we never get any indication of what Owner's gender is, including through his/her letter(s).