You cannot legally use @font-face to serve this font from your webserver without a proper webfont license. Instead, use system font stacking:

A stable, solid gothic (sans-serif) structure that prioritizes clarity in multimedia markets. Licensing and Usage Restrictions

Apple SD Gothic Neo Light is a refined, modern sans-serif typeface primarily known for its clean aesthetic and extensive support for Korean characters (Hangul). While it is a system font on Apple platforms, users on other operating systems often look for ways to download and use it.

No, because Google Docs uses web fonts only. You would need to install the font on your local computer and use the “More fonts” → “Upload” – but that’s not officially supported. Use one of the alternatives above.

For 99% of users—students, freelancers, small business owners, or hobbyists—downloading and using Apple SD Gothic Neo Light for free is perfectly legal and acceptable.

A humble designer named Mia discovered the file. She whispered to her screen: "apple sd gothic neo light font free download" — and there it was.