Gate Sentry is revolutionizing visitor access management for guarded properties by eliminating traditional and costly hardware, such as scanners and computers, which significantly slow down the visitor entry process. Our approach utilizes mobile and tablet software to establish a direct link between users and security personnel, ensuring the most accurate visitor lists. The app enables users to manage their guest lists from anywhere, at any time, on any device, providing real-time updates to the security guard software for a seamless and efficient access control process. Users receive arrival notifications and can access a visitor history entry list. Furthermore, our security tablet software consolidates all activities into a single, streamlined tool with advanced search capabilities, allowing security staff to quickly locate visitors based on various criteria and dramatically reducing visitor access time to 5 seconds or less.