GL-AR300M work fine as the wi-fi repeater.
However, I did not find the way to make LAN and WAN ports of Gli working in the configuration to provide internet for two ethernet-connected clients (I want to use Gli as the ‘Wi-Fi bridge’ for 2 ethernet-connected devices).
Gli connects to the main router, ‘repeats’ the signal via wi-fi, but do not share it with its LAN and WAN ports
In other words: I want Gli to be connected to the main router via Wi-FI, at the same time I want it to share internet for 2 PCs which are connected to GLI via LAN and WAN ports. In this configuration, Gli would ‘emulate’ ethernet connection in the situation when 2 PCs cannot have a direct cable-based connection to the main router but can use Gli as the small ‘radio bridge’.
P.S. Sorry for the terminology I used, however, I have no any problems when using Airport Extreme (as the main router) and Airport Express as the device which connects to the main router via wi-fi and which shares internet for 2 ethernet-connected devices. Unfortunately, I could have not repeated this configuration with Gli