I have actually been down this road as I wanted the gazebo for my reception as well! What they call the "gazebo" is only allowed for the ceremony and not the reception...not even for an extra price from what I was told (bummer!) But they do have what looks like a gazebo on the La Perla side for the reception that you can use. It is what they call poolside, but it does have a palm roof. Unfortunately, I have a few kids coming to my wedding, so I couldn't use the adults only side for my reception, but maybe it will work for you! I ended up going with poolside at La Esmeralda just because it looks gorgeous and I don't have to pay an extra fee. If only I had it in the budget to do it at the Gabi Club
A gracious bride from this forum sent me the documents that have the pricing and locations for the ceremonies and receptions and I will be happy to pass on to you. Just send me a PM if you would like it as it definitely helped me out!
Hope this helps!