Aubameyang was furious after he and his Gabon teammates were stuck at an airport in Gambia as officials argued over Covid-19 testing.
The 31-year-old posted pictures of players sleeping on the airport floor, writing: "Nice job CAF, it's as if we were back in the 1990s."
He later added: "This will not demotivate us but people need to know and CAF need to take responsibility. [It is] 2020 and we want Africa to grow but this is not how we will get there."
CAF's disciplinary committee labelled the content "offensive and degrading". Gambia's FA were fined $100,000, around £44,000, half of which has been suspended for two years.