A couple of thoughts. If the entries in the GEDCOM have no source info, I'd say no. You wouldn't be adding much value to wikitree by uploading unsourced profiles. Also you should not copy someone else's work without their permission. See the wikitree honor code
If you do have their permission and the profiles have sources, your genealogy program should have the capability to add a source to every person at the time you export it. You could make that source be the information about the origins and researcher of the original GEDCOM