MIT/BSD are fully supported by the FSF and are GPL compliant. They are free software licenses in all aspects.
To be clear, GPL compliance is not a prerequisite to being a free software license. There exist many free software licenses which are not technically GPL compliant for various reasons: http://www.gnu.org/licenses/license-list.html#GPLIncompatibl...
However, while freedom does not imply GPL compliance, I do believe GPL compliance implies freedom. I'm not 100% certain of this, but I can't think of a counterexample or how that might not be true.
(I know you probably know this, but I want to make sure others reading your comment do too).