> Isn't GMO to create foods that require less pesticides?

That depends entirely on the kind of GMO. GMOs don't exist for any particular single purpose. Some GMOs exist to make it easier to use pesticides. Some GMOs contain pesticides.

Some GMOs have nothing to do with pesticides but add nutritional value. For example, Golden Rice, which has beta-carotene added to increase the vitamin-A intake of the hundreds of millions of people who subsist mainly on rice, generally gets mentioned as the one GMO that's completely positive with no discernible downside: it doesn't mess with ecosystems in any way, beta-carotene is already common in many plants, it doesn't do anything pesticide-related, and it makes people healthier.