This paper presents a web-based ground control station (GCS) designed to manage a fleet of heterogeneous Unmanned Aerial Vehicles (UAVs) based on a client-server architecture. The primary focus of the developed software is to efficiently oversee and monitor multiple UAVs engaged in long-range missions. The GCS emerges as a scalable solution compatible with various autopilots through the use of the Robotic Operating System (ROS) framework, featuring a user-friendly interface crafted to handle numerous UAVs seamlessly without overwhelming the operator. It allows multiple operators to assign different tasks to the UAV, monitor telemetry, view images from onboard cameras, and control the flight through the GCS. The implemented interface boasts a minimalist design, allowing users to effortlessly navigate and control multiple UAVs. This design philosophy aims to enhance user experience while ensuring effective mission management. The GCS enables connection with external programs, facilitating seamless integration with third-party applications.