i am assuming about how to get the burst in photoshop? well this will give it to you follow these steps
Burst
-use gradient tool select to colors and hold shift while you drag from the top of the canvas to the bottom to make a gradient between the two colors
-filter distort wave (gen 15, wave 5 and 35, amp 10 and 50, scale 100 and 70)
-filter distort polar (100 percent, rect to polar)
-filter sharpen unshap mask ( am 229, radius 54, thresh 0)
-cut out the shape of the icon you want
i see i used to have gimp but i never used it i found how to get photoshop free so sorry but i'm not sure if gimp has the same filters that i described and a gradient tool if so then it should work the same