GoFundMe only accepts donations via PayPal to Certified Charity campaigns created after November 3, 2016.
All Personal campaigns (as well as Certified Charity campaigns created prior to November 3, 2016) accept donations by credit or debit cards only.
If you're unable to donate using a credit or debit card, you can always get in touch with the Campaign Organizer to ask whether they're able to receive your donation another way.
To do this, visit the campaign you'd like to donate to and click or tap the envelope icon next to the Campaign Organizer’s name. This will allow you to send them a direct message.