Should be able to do this under the advanced settings (the OpenWRT LUCI interface) - the GL-iNet WebGUI assumes WPA-Personal with pre-shared keys.
There’s more than a couple of ways to do WPA-Enterprise, some with certificates…
Note - if you’re in a corp environment - many Wireless LAN Controllers will do rogue AP detection, as this can be viewed as a potential security issue, so step carefully lest you end up in one of those intense one-on-one sessions with IT and Human Resources, along an an opportunity for a resume update…