I think the problem is in your X, Y, Width and Height of your window, you're using sx and sy with relative on, they are gui elements not dx, try to put something like
groveWindow= dgsCreateWindow (0.15, 0.33, 0.7, 0.34, "GROVE STREET", true, tocolor(0 ,0 ,0), sy*30, false, tocolor(0 ,238, 0 ,255), nil, tocolor(28 ,28, 28,120), 5,true)
And see if it still doesn't shows
When you're in gui elements you don't need to calculate the screen width and height by yourself