My active screen's resolution is 1440 X 900. You code seem to default to 1920 X 1080. What I do for my games is I check the user's screen dimensions with "display_get_width" and adapt the screen accordingly (simplified code below) :
var dw = display_get_width();
if(dw >= 1920){ w= 1920; h= 1080;}
else if(dw >= 1280){ w= 1280; h= 720;}
else if(dw >= 640){ w= 640; h= 360;}
surface_resize(application_surface,w,h);
display_set_gui_size(1920, 1080);
window_set_size(w,h);