The book title is called 'The Great Gatsby' because of his image and high status in New York society. Gatsby is known for holding extravagant and magnificent parties, and he has one of the most wealthy and beautiful properties in West Egg. The book is appropriately titled 'Great Gatsby' because he's 'great' to them, a mysterious and almost magical figure to all the people whose lives he has touched upon.
In the Great Gatsby, Myrtle gives different excuses to leave, to see Tom. On the day Nick is out with Tom, they meet Myrtle in New York, and she tells them, that she had told George, that she was going to visit her sister. Tom always uses his car, to visit Myrtle, by telling George, that he would one day sell his car to him.