The gerund in the sentence provided is 'driving,' which is a verb form ending in -ing that functions as a noun.
Therefore the answer is ,the gerund in the sentence is driving. A gerund is a verb that functions as a noun and ends in -ing. In this case, it is used as the object of the verb 'avoid'.In the sentence 'Gillian avoid driving in the highways as much as possible,' the gerund is 'driving.' A gerund is a verb form that ends in -ing and functions as a noun in a sentence. In this case, 'driving' is the action that Gillian avoids, and it is the subject of the verb 'avoid,' thus it is acting as a noun, which is the characteristic of a gerund.