If you would like to create a contact group in Gmail, follow the instruction below:
- enter into contacts.google.com
- on the left-hand side choose create Label
- name your label
- choose the individuals you would like to add to your label by clicking to the left of their name
- select the label icon at the top and choose apply
You can now enter into Gmail and type in the name of your label and email the individuals you would like to.
Embedded below is a 1 minute and 9 second YouTube tutorial.