here's a little tutorial on how to instal your Canon GL2 as a Deck on Avid.
1st open avid, and open up your Capture Tool.
2nd Click the button under the play button on the Capture Tool. It should say something about Generic Deck.
3rd click Adjust Deck.
In here name it what ever? doesnt really matter.. then Click the brand etc and set it up that way. Look for your camera. If it's not on there, well I cant really help you that much...