The Internet of Things (IoT) allows interconnected devices for sharing and controlling data among each other as things are connected through the Internet. Communication among these devices that are part of Wireless Sensor Networks (WSNs) and the Internet is eased with the help of Internet Gateway, which is termed IoT gateway. The performance of IoT networks is affected by various network parameters such as the position in the network gateways, heterogenous coordinating devices, link selection and link assignment, link scheduling, and transmission scheduling. To increase the performance of the network, the placement of the gateways should be optimal, which reduces the deployment cost and increases throughput. Furthermore, more than one gateway is placed to reduce congestion within the IoT network, resulting in noise and increasing the cost. Most researchers focused on the placement of internet gateway or mesh routers in the Wireless Mesh Network (WMN). The gateway placement problem needs to focus on IoT networks where heterogeneous wireless technologies are involved for machine-to-machine communication (M2M). It is challenging to deal with different wireless technologies along with gateway placement for the network throughput maximization. In this article, we propose the “Novel Gateway Select Algorithm,” which selects the best candidate gateways to achieve throughput maximization during heavy traffic load on coordinating devices or intermediate gateways. The evaluation of the performance of the Novel Gateway Select algorithm is demonstrated by using simulation. The result proved that the proposed system selects the appropriate candidate gateway with high throughput and minimum average load considering the dynamic variance of heavy traffic at each coordinating device or intermediate gateway in the IoT network.