Position the text cursor where you want to insert the Gmail emoticon.
Click theInsert emojibutton in the formatting toolbar (it has a smiling face).
Choose the desired emojito insert it.

Use the tabs at the top to browse different Gmail emoji categories.
Gmail remembers the emojis you use and keeps them in an extra tab for quick access.
Also, you might highlight and move or copy graphical smileys just like text.
Launch the Gmail app on your mobile phone and create a new message.
Tap theemojibutton to bring up the emoji keyboard.
Tap the emojis you want to add to your message.