I am mamking gerbera daisies and am having a problem with the center design. Does
anyone have a turorial or any advice of how to make them. I am using fondant/gumpaste for the
petals.

There's a mold for gerbera daisy centers on the green silicone wilton flower impression mat.

Before I got the mold, I used to just roll a small ball of paste, flatten it slightly and then poke all over it with a plastic lollipop stick or small round tip.

I usually flatten a ball of yellow gumpaste/ fondant and then us my pastry tip that is used for making grass and just press over your center with that. Works great for me...

When I did these daisies, I rolled a ball for the centers, slightly flattened them, then dusted them with yellow cornmeal:

http://cakecentral.com/gallery/1923723/easter-2010

YES Marie1152 - this is exactly what I do too!

I'm taking the new Wilton Course 4, Advanced Gum Paste Flowers. The second flower we learned is the Gerbera Daisy. I posted some photos of that process and what the center looks like using the mold that came in the student kit (it's slightly different than the older Wilton mold; not sure which one I like better):
http://theicedqueen.blogspot.com/2012/02/gerbera-daisy-from-wilton-course-4.html

I like that idea of using the grass tip #233! I will definitely give that a try.