Hello! So I'm having some trouble with saving gifs on Photoshop CS3. Everytime I save it, it turns out really grainy. Is it the way I'm saving it? Please help. Thanks

It probably has to do with gif only supporting 256(?) colors.

Otherwise, check your compression.

Are you saving it by clicking "Save for Web & Devices"? Yeah, it could also be the fact the .GIF files only support up to 256 colors.

Try saving it this way:

Save For Web & Devices
Change the dropdown to .GIF
Change the quality to 100/Maximum, can't remember which it is.

When you save your gif, you could always try resetting the settings to default.
Maybe you messed around with something?