Sorry about that.
After looking at some of the specs on that device, I believe it is too advanced for GoToMeeting to work with directly. Under normal circumstances, GoToMeeting is looking for a built-in microphone, or a plug-n-play device connected via USB or 3.5 mm cable.
At this time we don't offer support for this audio connection type, however, some users have found luck experimenting with various converters. I just would not recommend this unless you already had some around, because buying additional unsupported hardware cannot only become expensive but is also hit or miss.
Is this still a problem? A few months ago I tried to get GoToWebinar to recognize a USB Mixer (which I have a dynamic mic connected to) and it wouldn't. I really don't understand how GTW doesn't support these interfaces - it's how most people record any audio that needs to sound halfway decent.
Has this been fixed?
Try adjusting the device properties in Windows (if that is what you are using). Others using similar devices have found adjusting the sample rate etc made the device visible to GoToMeeting.
We have a Focusrite Clarett 8-Pre and are having similar connectivity issues. We can get GoToMeeting/Webinar to recognize the device, but it only accepts 1 channel and it has to be running at 96hz or else the audio is choppy - which is odd because GoToWebinar only supports 44.1 or 48hz.
The way we worked around the issue was to send a monitor signal from the interface to an older usb mixer that is only 2/stereo channel output - Allen & Heath ZED10FX. At this point the Clarett interface is basically just an aggregate devise for more channels.