It can be either. "Viator, Viatoris" for a male traveler, "Viatrix, Viatricis" for a female traveler. Given the Roman attitude towards women, one would probably see "Viator" much more often. Both are third declension regular nouns.
Gens (gen. gentis, feminine).
"Gens" is a feminine noun in French.
Gens
'Clan' in Latin is 'gens' [gehns], the plural being 'gentis' [GEHN-tis].
Feminine.
The Latin word for wife is uxor, a feminine noun.
Victoria is the Latin equivalent of 'victory'. The Latin word is a feminine gender noun. From it comes the feminine first name, Victoria.
The latin word for fat is: obesus (masculine), obesa (feminine)
Clans or Families is the English equivalent of 'gentes'. The Latin word is a feminine gender noun that's in the nominative plural as the subject of the sentence. The nominative singular form is 'gens'. An English derivative is 'gentile'.
pictura, picturae feminine
Feminine.
The root of the word "generation" is "gen," which comes from the Latin word "gens" meaning family or clan.