In one of GTA V Trevor’s quest you had to flew a plane to drop of ‘merchandise’ at spots around the neighbourhood.

In that mission the plane they use it this An-2 plane, an agriculture plane farmer usually had around their corn fields.

An-2 also uses for parachuting, light utility transport and one of An-2 variant could carry 12 passengers.

its real name is Antonov An-2 . I think it’s used to spray bugs repellent on crops.

You get to use this plane throughout the game and upgrade the plane into better ones once Trevor’s business gets bigger and expand.