Gemini will only host giveaways on the following official Gemini social media handles:
Please be aware that giveaway scams are very common. These scams will often use Gemini’s name and logo and may include Gemini’s founders Tyler and Cameron Winklevoss. If anyone asks you to send them digital assets and promises to send you back more, this is a scam. Gemini does it's best to report these scams, but it is difficult to stay on top of all of them as they pop up very often.
The Gemini Security team has put together a blog post on scams that can be read about here: Our Take on YouTube Bitcoin Scams