You might want to also post this question on the Complementary Forum. A fellow name Paxiled is very knowledgeable and others over there too.
No, geographic tongue is normal, and somewhat hereditary. I have had it for years and have also been tested for HIV multiple times. Plus, my neice has it on her tongue, so more than likely you are ok. You aren't going to get HIV from being near someone anyway, unless you are having sex with them unprotected. Just use protection. =D