A day late on this so my apologies for not being able to help with the issue in time but for future reference, there is no way that I know of to turn that camera into a webcam for GoToMeeting. At the very least, this would require a video capture card with HDMI to take the camera feed into the computer. These cards though don't actually interface with the drivers that run the webcams so you can't really turn it into one.
Matrox has some streaming hardware that does something similar to what you want, but it is designed to work with specialized software that is primarily for television broadcast and web streaming. Even the Matrox hardware won't allow the camera to interface with the webcam drivers needed for GoToMeeting or any other webcam based application such as Skype or iChat.
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The College of William and Mary