Hi Prabaljit! Welcome to the Swift community, and thanks for your interested in participating in GSoC with Swift 
Here's a little bit more information on how to get started with the property wrapper project:
The particular direction I have in mind for this project is at the end of that post - designing a way for property wrappers to opt into having static storage. The design of this feature today already uses information that is shared across property wrapper instances (the key-paths to the wrapped property and its storage on the enclosing type), and this can be generalized because it's useful for more than just access to the enclosing self instance.
That said, if you have other ideas, I would love to hear them! Please let me know if you have any questions.