Another option is to download a family from one of the sites that have good content such as arcat or seek.
How to insert a glass door in revit.
If needed click modify place door tab tag panel tag on placement to place tags with doors.
Click architecture tab build panel door.
In revit 2018 you will not be able to load a curtain wall door by using the architecture build door ribbon tool and then choosing the modify place door mode load family tool.
Click the type selector and select a curtain wall door.
Switch to a 3d view hover over the edge of your curtain wall panel where you d like to place the door.
Move the cursor over an edge of the curtain panel to be customized until one of its mullions or the curtain wall highlights.
In the type selector verify that double glass 2 is selected.
Press tab until the panel highlights and then click to select it and display the pin.
Now use the key to cycle through the various options to select the panel you d like to change to a door.
Instead use the insert load from library load family tool to do so.
Open a plan elevation or 3d view of the curtain wall.
Now in the element drop down menu where it says system panel.
If the panel is pinned indicating it is part of the curtain wall type definition un pin the panel.
Press tab until the panel is highlighted and then click to select the panel.
Click to place a door in the north exterior wall of the building as shown.
Add a door to a curtain wall.