Yes you can freeze guacamole.
Just place the guacamole in a freezer safe container or Ziploc bag and then place it in the freezer.
The guacamole will last in the freezer for up to a year but after 6 months the frozen guacamole loses it's freshness and may change texture.
You can just sit the guacamole out at room temperature to thaw it out or place the guacamole in the microwave to thaw it out.
Guacamole is best eaten when fresh and not frozen but it's okay to freeze guacamole and then thaw it out and then heat it up when needed.
I've frozen guacamole and it was just fine.