Developing a visible light communication (VLC) system using Generalized Frequency Division Multiplexing (GFDM) for 6G transmission and receiver in MATLAB requires a comprehensive approach. First, you need to understand the principles of VLC and GFDM, including modulation, demodulation, and channel coding techniques. Next, implement the transmitter side, which involves generating the GFDM symbols, applying the necessary modulation schemes, and converting them into light signals using appropriate drivers. Then, focus on the receiver side, which includes capturing the light signals using photodiodes or image sensors, processing the received signals, demodulating the GFDM symbols, and decoding the transmitted information. Additionally, consider the channel characteristics, such as channel impairments, equalization techniques, and synchronization mechanisms. It's essential to tailor the MATLAB code according to your specific requirements and adapt it to your hardware setup to achieve reliable VLC communication in 6G.