My GG email address won't fit in the GG Launcher login field.

This issue can be fixed by changing the text size in your operating system. Follow the steps in this guide to change the text size in Windows 10/11:

1) Select Start, Settings, Ease of Access (Accessibility in Windows 11), Display (Text Size in Windows 11)
2) Adjust the slider under Make Text Bigger (Text Size in Windows 11)

The smaller text size will allow you to input your email address in the GG Launcher login field. Please note, that the GG Launcher doesn't support emails which contain more than 30 characters in their names.