It's hard to say. You might need to do some research or look for reviews and comments from people who are familiar with it to find out if it's based on a novel.
I'm not sure specifically as I haven't read it. But it could be about love, given that many novels revolve around this theme. Maybe it's a story of Gul and Rana's love story, with all the ups and downs that come with it.
Love is a very common theme. Whether it's the development of romantic love between them or their love for friends and family that affects their relationship. Another common theme is friendship. Since they are likely to have a strong bond, stories often explore the different facets of their friendship.
Online bookstores such as Amazon could be a good place to search for 'gul e rana complete novel'. They have a vast collection of books, both in print and digital formats. Just type in the title in the search bar, and see if it pops up. You can also check the reviews and ratings there to get an idea of the book's quality.
Kate and Rana's story in Coronation Street was a roller - coaster. They met and fell in love. Their love wasn't always easy as they had to navigate through the small - mindedness of some of the other characters. Their relationship was a big part of the show. Kate was a bit more outgoing while Rana was more reserved. But they complemented each other well. When Rana passed away in that tragic accident, it was a huge blow to Kate and to the viewers who had become invested in their relationship.
The 'gul e rana ending story' might refer to a story where Gul and Rana are the main characters. The ending could involve their resolution of a conflict. For example, if it's a love story, perhaps they finally get together at the end. Or if it's an adventure story, they might have successfully completed their quest and are now living in peace. Without more context, it's difficult to say for sure.