Here is a comprehensive list of lists.  Basically, if there is a particular aspect of FMG stories that you enjoy, you can search for that aspect by category here.

WARNING:  Some of these lists will inadvertantly have spoilers within them.  If you are someone who wants to avoid spoilers at all costs, then you may not want to look at some of the categories.  That said, the stories are usually fairly predictable.

 

Categories – Types of Gain

Stories with Height Gain

Stories with NO/little Height Gain

Stories with Intelligence Gain

Stories with Breast Growth

 

Categories – Girl Morality

Stories with Morally Good Girls

Stories with Very Power Hungry Girls (not necessarily evil)

Stories with Morally Evil Girls

 

Categories – Growth Agent

Easy Gainer

Science and Technology

Magic and Supernatural

Transfer

 

Categories – Other Themes

Growth From Sex

Superheroes

Stories with Multiple Growing Girls