Hui Zhou Gaoshengda (GSD) device on my network
Hui Zhou Gaoshengda Technology is a Chinese maker of Wi-Fi modules and networking equipment for other brands.
What Hui Zhou Gaoshengda (GSD) makes
Gaoshengda builds wireless modules and complete routers and gateways on contract. Its modules are used in smart TVs, streaming boxes and other consumer electronics sold under other names.
What the device on your network probably is
Most likely a smart TV or streaming box. Next most likely a router, extender or other networking device sold under another brand.
How to work out which device it is
Check the network settings screen of each TV and streaming box for its MAC address. Turn devices off one at a time to see which entry disappears. RECON's LAN Scan can show what services the device offers, which helps tell a TV from a router.
Should you be worried
Normally nothing to worry about. Gaoshengda built the radio board, and the product is almost always sold under a different brand.
The app finds every device on the Wi-Fi you are on, at home or in a rental, and puts the vendor next to the hostname, the services it advertises and its open ports, which together usually name the product. Where it cannot tell, it says so instead of guessing. Get RECON for iPhone — one-time purchase, no account, nothing leaves the device.