What we'd used for doors would either be those, or perhaps equilateral or depressed arches -- less dramatic forms.
But now that I've looked it all up, I'm tempted to try making a stained glass piece featuring the flamboyant arch, pictured below. The style is marked by S-curves in the tracery causing each light to take on a flamelike or "flamboyant" shape. So beautiful! And kind of sexy, no?
I think it's more generally known as an ogee arch: "The ogee shape is one of the characteristics of the Gothic style of architecture, especially decorative elements in the 14th and 15th century late Gothic styles called Flamboyant in France and Decorated in England. Ogee windows and arches were introduced to European cities from the Middle East."
It would be very hard to cut the glass, though. And the leading would also be very finicky work. I think I should practice with simpler shapes for a good long while before I attempt one of these.