The plural form of the proper noun Gus is Guses.
The plural possessive form is Guses'.
Example: The two Guses' last names are Graham and George.
The possessive form for the proper noun Gus is Gus's.Example: We're invited to Gus's backyard barbecue.
The singular possessive form for the proper noun Gus is Gus's.example: Gus's father will pick us up at four.
The plural form of Gus is Gus's.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is relatives. The plural possessive is relatives'.