Are you okay with people potentially making a closed-source fork of your code? If yes, then choose a permissive license like MIT, BSD, or Apache. If you do not want people to make closed-source versions of your code, and want all forks to remain open-source, then go with GPL.
Remember that choosing the GPL means other people, especially businesses, will be less likely to consider your project because that would mean they would have to make their versions open-source, which some people may not want to do.
EDIT: As always, this is not legal advice and I am not a lawyer.