Gaps on resumes have been a conundrum since the advent of resume writing. In order to avoid a lag between jobs, or a spotty job history, many applicants stretch months or even years on their resumes. Some take out the months and leave the years, to make it appear that they worked longer than they did.
As a company whose job it is to find inconsistencies on resumes, we would consider this to be a red flag, highlight it and point it out to our clients.
People do have gaps in their resumes, however, there are honest ways of presenting them, such as explaining them in a cover letter or using a functional resume.
If someone is going to present false information on their resume, which is their calling card, what else are they not being honest about?