This particular icon has two vertical lines that are sitting parallel to each other. At the ends of both lines is a curved line that curves inwards towards the two vertical lines.
This Gemini icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.