One of the fun things about Rebecca Danger's monsters is that they each have a backstory. Here's what the book says about Gabby:
Gabby currently resides in a lovely vegetable garden. She's a socially awkward monster and feels most comfortable talking to fruits and vegetables. In particular she likes tomatoes (I think she sees some family resemblance there, but she denies it every time I ask), but she's more than happy to talk to lettuce, zucchini, broccoli, snap peas, and even carrots. She enjoys cracking jokes with the veggies. Her favorite joke, the one that keeps her rolling on the ground with laughter for hours? "What did the garden vegetables say? Lettuce, turnip, and pea!"
Talking to the Baby Cucumbers
Flirting with the Blackberry Vines
Basking with the Roses
Coaxing the Tomatoes