If you mean gessi as a masculine plural form of noun gesso (a cast), the verb sunt is form of third person plural active present indicative of verb esse (to be). So, the translation in English would be: They are casts.
But, if you by any chance mean gesti sunt, that would be the form of form of third person plural passive perfect indicative of verb gerere (carry, bear). The translation in English would be: They were carried.
Answer: person, third
number, plural
tense, present
Explanation:
perfect tense with the nt ending is third person and nt is plural
