This is the Logowanie Gmail icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
This is the G-Mail login logo. There is a rectangle which contains an "M" that uses the left and right of the rectangle to form the left and right of the "M". There is an arrow through the top that points down.