Pops 9 Guis in appropriately sized proportions to match your screensize

AHK MultiGui

#SingleInstance, Force

Screen_X := Floor(A_ScreenWidth / 3) ;- 2
Screen_Y := Floor(A_ScreenHeight / 3) 

;Msgbox % Screen_X

GUI1_X := 0
GUI1_Y := 0
GUI1_H := Screen_Y
GUI1_W := Screen_X

GUI2_X := Screen_X
GUI2_Y := 0
GUI2_H := Screen_Y
GUI2_W := Screen_X

GUI3_X := Screen_X * 2
GUI3_Y := 0
GUI3_H := Screen_Y 
GUI3_W := Screen_X

GUI4_X := 0
GUI4_Y := Screen_Y
GUI4_H := Screen_Y
GUI4_W := Screen_X

GUI5_X := Screen_X
GUI5_Y := Screen_Y
GUI5_H := Screen_Y
GUI5_W := Screen_X

GUI6_X := Screen_X * 2
GUI6_Y := Screen_Y
GUI6_H := Screen_Y 
GUI6_W := Screen_X

GUI7_X := 0
GUI7_Y := Screen_Y * 2
GUI7_H := Screen_Y
GUI7_W := Screen_X

GUI8_X := Screen_X
GUI8_Y := Screen_Y * 2
GUI8_H := Screen_Y
GUI8_W := Screen_X

GUI9_X := Screen_X * 2
GUI9_Y := Screen_Y * 2
GUI9_H := Screen_Y 
GUI9_W := Screen_X

Gui, 1: -Caption
Gui, 1: Add, StatusBar,, This is GUI 1
Gui, 1: Show, x%GUI1_X% y%GUI1_Y% h%GUI1_H% w%GUI1_W%, Test
Gui, 2: -Caption
Gui, 2: Show, x%GUI2_X% y%GUI2_Y% h%GUI2_H% w%GUI2_W%, Test
Gui, 3: -Caption
Gui, 3: Show, x%GUI3_X% y%GUI3_Y% h%GUI3_H% w%GUI3_W%, Test

Gui, 4: -Caption
Gui, 4: Show, x%GUI4_X% y%GUI4_Y% h%GUI4_H% w%GUI4_W%, Test
Gui, 5: -Caption
Gui, 5: Show, x%GUI5_X% y%GUI5_Y% h%GUI5_H% w%GUI5_W%, Test
Gui, 6: -Caption
Gui, 6: Add, Button, gClose, Close
Gui, 6: Show, x%GUI6_X% y%GUI6_Y% h%GUI6_H% w%GUI6_W%, Test

Gui, 7: -Caption
Gui, 7: Show, x%GUI7_X% y%GUI7_Y% h%GUI7_H% w%GUI7_W%, Test
Gui, 8: -Caption
Gui, 8: Show, x%GUI8_X% y%GUI8_Y% h%GUI8_H% w%GUI8_W%, Test
Gui, 9: -Caption
Gui, 9: Show, x%GUI9_X% y%GUI9_Y% h%GUI9_H% w%GUI9_W%, Test

return

Close:
ExitApp