Well, the concept of being physically restrained against one's will could be inspired by real - life events such as kidnappings or hostage situations, although not exactly the same. The feelings of isolation and the fight for survival are also things that can be seen in real - life survival stories. Moreover, the exploration of a woman's internal struggles, her fears, and her attempts to regain control could be related to the real - life experiences of women who have faced difficult situations where they had to fight for their own agency and freedom, whether it be in an abusive relationship or in a situation where they are physically incapacitated.
One possible real - life inspiration could be the idea of being trapped and helpless. This can be related to situations where people find themselves in difficult circumstances they can't easily escape from, like being lost in a remote area or in a locked room by accident.
The psychological aspect of the story might be inspired by real - life cases of people dealing with trauma and the mind's ability to play tricks. For instance, when someone is in a high - stress situation, their mind can create hallucinations or distort reality, similar to what the main character experiences in Gerald's Game. Also, the relationship dynamics between the characters might be drawn from real - life relationships where there is a power imbalance.