GLC is a very good show on the whole, it provides a very relating cast and it is a standard Disney show about normal family life, they have the same tropes as they do in Disney Shows, but the family often bands together, and the sister Teddy always learns her lesson and documents it in her video diary so her sister Charlie can learn from her mistake.
Though the characters often lie and deceive, they do get consequences, and they grow and learn from their mistakes and they are seen doing it less. They also deal with themes like neglect or relationship problems, and they never have the main character act to rude or rebellious, she is painted as a good student with good morals.
Amy and Bob's dialogue may be a cause for concern as Bob is often the butt of many jokes including his weight, which can bring down the quality tremendously.
Gabe misbehaves but mellows out with age, showing that the characters do go through growth, a similar instance is with PJ, though slightly flanderized, he eventually retains some sort of intelligence, as he has goals and aspirations like all the characters do.
When Toby arrives, Charlie has too adjust as she grows older, Amy has a dream about how she fears that they will all leave Charlie out to care for the new baby and Gabe tells Charlie she will get less attention, and the parents talk with Charlie later on telling her calmly that they might have to spend more time with the new baby. They also make sure to have some fun with Gabe, even though it ends up being in vain, it shows that they do love there children, a trait unlike other sitcom parents these days.
Originally Toby is resented and disliked by Charlie, but eventually they seem to like each-other and Amy and Bob constantly try to help mend the issue between the two.
These instances showcase that the parents are good rolemodels and the show does send positive messages in turn, overall it is a very good show for a grounded Disney sitcom.