From their website (personal campaigns are almost guaranteed not to be deductible, despite what is says about checking with a tax pro):
Donations made to a GoFundMe Personal campaign
are generally considered to be personal gifts and are not guaranteed to
be tax-deductible. You can always check with a tax professional to be
sure. Only donations made to a GoFundMe Certified Charity campaign are guaranteed to be tax-deductible.
Not sure if you donated to a Certified Charity campaign? You
should've received a tax-deductible receipt from our charity partner
FirstGiving. You can also visit the campaign you donated to and look for
the 'Certified Charity' badge. Here's how it looks: