Converting a Beamer Presentation to Google Slides

It's not exactly doable because of a fundamental mismatch in LaTeX's design and what Google Slides (and other mainstream presentation software wants). Export beamer slides to powerpoint/openoffice-impress/keynote editable format is probably your best best for a solution—I'm pretty sure that Google Slides can import powerpoint and the solutions at the linked question can at least get you part of the way there.