The two "Top Gun" marked aircraft in the movie are a fictional VF-1 badge that looks sort of like an eagle streaking towards the ground, with "VF-1" in the curved band below it.
And the other aircraft has a fictional VFA-213 script underneath the "fighting fist holding a thunderbolt" of VA-25 "Fist of the Fleet"
the actual aircraft were provided while VF-111 Sundowners were shorebound (but, only the two above were painted up for the movie)
This info is covered in the Testors 1/72 Top Gun Tomcat release, and Colors & Markings Volume 8 on Pacific coast Tomcat squadrons.
Rex