Not really. In Russian, it's usually follows what it feels intuitively closer to - i.e. if it ends with a vowel like "a", it's likely to be female - Coca-Cola, Nutella, Fanta, etc. If it ends in consonant, it'll be male. If it ends in "o", "e", etc. - probably neuter. Though there could be more complex cases - e.g. I'm not sure what gender would something like "Subaru" assume. Probably depends on implied noun - if it's a "company named Subaru" then probably female, because "company" is female, if it's a restaurant named "Subaru" (assuming such one exists and is not sued for trademark violation) then it's be male because "restaurant" is male. Some speakers would just avoid putting such words into a context where such decision needs to be taken (fortunately, Russian has no articles, so die/der/das is not an issue :) or attaches explicit native noun like "company" or "restaurant" to make it clear.

Some words are kind of gender-fluid too. E.g. a word meaning "hall" was female and neuter in past centuries, and now is male. The word for "coffee" is male in formal/educated speech and neuter is less-educated but (to my despair) rapidly gaining legitimacy speech. Russian is fun :)

For things like the user, you can always assume male, but as with other such assumptions, some people may object to it. In some cases, there is a built-in assumption that male includes female when gender is unknown, but in others it just means male and that's it.