You should be used to driving that car by now.
My mother will have to get used to looking at my new haircut.
driving and looking are not technically gerunds; they are progressive verbs. Progressive verbs and gerunds usually look the same, (bare infinitive form of the verb + ing) but they function differently in a sentence.
I am driving to work. (present progressive tense) Driving is difficult. (gerund)
A gerund is a verb (usually ending in ing) that functions as a noun in a sentence.
A progressive verb is one that indicates an ongoing action.