Gaia Online uses a comic font called "Wild and Crazy".
To download this font by itself in .ttf format, click here.
To download it's companion font, Wild and Crazy SFX in ttf format, click here.
To download both fonts together in a .zip archive, click here.

How do you use these? On a windows machine, simply place or save the ttf files in your fonts folder. For most people, this is C:/WINDOWS/Fonts. If you are running Windows Vista, save the ttf files anywhere. Then right click the file and hit "Install" from the menu that appears. Then click continue on the user account control pop up window.
If you download the .zip archive, simply open up the archive, hit "extract all" and tell your program to extract to the desired folder, which in most cases would be C:/WINDOWS/Fonts.

After the fonts have been installed, they will show up in any of your installed editing programs as well as any program that uses fonts.

Most image editing programs come with some sort of speech bubbles in them. But sometimes you need more than that. Filmowe has made a pack of 36 speech bubbles that I personally like to use. There are others, but these suit my needs so I'll share them.
The pack is a set of Adobe Photoshop brushes for version 7.0 and up. It should also work in any other program that recognizes abr files (supposedly GIMP does).

You can download the brush set, in abr format, by itself here.
If you do not have a program that recognizes abr files, you can download a pack of png images of all the shapes here.
To download both the abr brush set and the png images, click here.

How do you use these? All sets come in a .zip archive. Open up this archive and extract the file(s) you need to a desired folder or place on your computer where you will not forget them. Alternatively, you can just extract them to C:\Program Files\Adobe\Photoshop (your version here)\Presets\Brushes\.
If you have extracted to the directory listed above, your brushes should automatically pop up the next time you load Photoshop. If they don't, or you have not extracted them to that directory, you must install them manually. To do this, open up photoshop, select the brush tool, then click the down arrow as if to select a new brush. From here, click the small sideways arrow. A new menu should pop up that says "load brushes".
Click this then browse to where you have saved your abr file(s) and load them into Photoshop.
If this doesn't make sense, or you need a picture guide, try this.

What about the png files? What are these for? If you do not have an image editing program that recognizes the abr filetype, you can either copy/paste these images to use in your editor, or make brushes or shapes out of them. How to make a brush or shape depends on the program you are using. Try using Google to search for answers.