need assembly instructions

Here is the manual for the LGZ099PST. Manuals for the other types of gazeboes are on the http://www.sunjoyindutries.com website.  You can find your model number on the whte tag on the inside of the canopy seam. 

https://dl.dropbox.com/u/75795406/L-GZ099PST_Assembly_Manual.pdf

Here you have a Customer Review  I was able to find on Amazon. You can read some usefull assembly tips:

'' I anchored the plastic base supports to my deck and also drilled a hole through the vertical section of the plastic base support AND the pole itself and put a screw through that. Then I anchored the poles on two sides to my deck railing. I also used cotter pins through the metal loops that connect each two sections of the tubular poles. Hard to explain, but it will make sense when you see how the poles connect. The point is wherever two pole sections are connected, you (or the wind) can pull them apart pretty easily, but not if you put a cotter pin through the metal loop. So, again with proper anchoring, this gazebo will work fine. It is very easy to assemble with instructions that a child could follow. It fits together well and looks better than it shows in the picture. One person complained of the fabric quickly fading to a pinkish color. The manufacturer must have changed at least part of the fabric on the one that I received. The main gazebo fabric has held its color well, but the top-tier roof section has faded to that pinkish color that the other reviewer mentioned. We have been through several major rain and wind storms and the gazebo is holding up well. There will be some puddling of water on the top, however, you can alleviate most of that by pulling the fabric as tight as possible and anchoring to the lowest notch at the base of each pole. All things considered, this is a good value for the money if you take a few extra steps to anchor it properly.''

You can read more info and tips here.