how does gary find out the twins are his on knots landing

Gary finds out the twins are his when Val tells Danny the truth in season 11, episode 4: Val says Gary is the twins’ father, and that starts Gary’s search and involvement.

What happens

• The key reveal comes through Val’s confession to Danny.

• After that, Gary brings Mack and Frank into the search for more information about the twins.

Context

This is the point where the story shifts from rumor and uncertainty to Gary actively dealing with the paternity reveal.

Episode note

A season 7 episode guide and broader series references also confirm the show’s timeline and character arc around Gary Ewing, but the paternity reveal itself is identified in season 11 material.

TL;DR: Val tells Danny Gary is the father, and that’s how Gary learns the twins are his.