Actually, these are not specifically just for the trams - they will also get you on the buses and trains as well.
A lot of the AMAG activities will take place at The Kurrawa Surf Club.
There is a gentle 20 minute barefoot stroll along the beach to get there, but if you can't walk, or even if you do not feel like it, you should get a ticket for each day of the Gathering to get you to Broadbeach and then a very short walk to the Surf Club.
Don't forget your checkout day - if you are flying out of the Gold Coast Airport at Coolangatta (OOL), you can use a ticket to catch a tram to Broadbeach South, then a 777 bus to the airport.
Similarly, if you are flying out of Brisbane (BNE), it will be a tram to Broadbeach South station, then a 744 or 745 bus to Nerang Station then a train to Brisbane Central station. The tram ticket will not get you to the airport, as that is a private line - you will have to buy a ticket to get you from Brisbane Central station to the airport.
If you have taken up the option of going up the Skypoint Tower, you will need transport to get from the Crowne Plaza to Surfers Paradise. A tram ticket will be ideal for this, so I highly recommend that you get a ticket for that Friday night.