What is the possessive form for Gladys?

Answer 1

There are two accepted forms for possessive singular nouns that end with an s:

Add an apostrophe (') after the existing s at the end of the word: Gladys'

Add an apostrophe s ('s) after the existing s at the end of the word: Gladys's

Examples:

I used Gladys' recipe to make the cake.

I used Gladys's recipe to make the cake.

Answer 2

Oh, dude, the possessive form for Gladys is Gladys'. That's right, just add an apostrophe after the s. It's like, super easy, man. So, if you're talking about Gladys' cat, you got it right.