The correct format would be 'Kelli and Gale are ... ' if Kelli is the only female or Kelli and Gale are both female. In addition the word 'are' is used with two or more objects are used in a sentence. You may also state the sentence as 'Gale and Kelli are ...'. According to etiquette, if you are referring to two or more persons, then you mention the female first and then the male subject. If Gale were a man and Kelli a female, then you would format the sentence, 'Kelli and Gale are ...'.
Kelli Hoffman's birth name is Kelli Derouin.
Kelli Dayton's birth name is Kelli Ali.
Kelli Finglass's birth name is Kelli McGonagill.
Kelli Lerner's birth name is Kelli Greenberg.
Kelli Dubay is an artist.
Kelli Garner's birth name is Kelli Brianne Garner.
Kelli Glover's birth name is Kelli Michelle Glover.
Kelli Griffith's birth name is Kelli Lyn Griffith.
Kelli Maroney's birth name is Kelli Joan Maroney.
Kelli Martinez's birth name is Kelli Renae Mitchell.
Kelli Joan Bennett's birth name is Kelli Joan Naomi Bennett.
kelli is 18 years old