You can easily eliminate every gap up to 12 months and some gaps up to 23 months simply by omitting months on your resume. Quit job A in January and joined job B in December of the next year? 2011-2013 at Job A, 2014-Present at Job B! Solved!
If they ask for details, then list all the places you went, and then if they're curious about any individual one give them more details about what you did there. If they don't ask for any details about travel, then they don't care, and you're not wasting time with irrelevant information by going into detail on travel from the beginning.
yes, they've been collecting this since the 70's/80's.