Usage patterns
ガラス戸を開けるto open a glass door
Since it was hot, I opened the glass door to let the breeze in.
ガラス戸が割れるa glass door shatters/breaks
The glass door shattered due to the strong wind.
ガラス戸越しに〈物〉を見るto look at something through a glass door
I looked at the flowers in the garden through the glass door.