CNRPANEL.button[1] = guiCreateButton(10, 41, 372, 310, "Cop", false, CNRPANEL.staticimage[1])
10, 41, 372, 310
10/1024 = 0.009765625
41/768 = 0.05338541666
372/1024 = 0.36328125
310/768 = 0.40364583333
Numbers in red represent YOUR resolution, where GUI perfectly fits on screen.
CNRPANEL.button[1] = guiCreateButton(sWidth*0.009765625, sHeight*0.05338541666, sWidth*0.36328125, sHeight*0.40364583333, "Cop", false, CNRPANEL.staticimage[1])
You can also use relative values (between 0 and 1), but then change 6th argument to true.