Bots and scammers comb through popular tags on Tumblr and mass-send asks with gofundmes or PayPal links.
These blogs often only have three posts to them, or have only ever reblogged content from blogs that have very similar names.
Praying on your empathy, they give a massive schpiel about who they are, how they're impacted, and how they desperately need your money or for you to reblog so others send them money to "help" them.
The money goes to scam artists anywhere but Gaza.
There is very few people actually "vetting" these blogs. There is no official vetting process. Do not trust Tumblr blogs or Google documents claiming to vet these posts.
If you want to help people in Gaza, please head to places like World Central Kitchen. This is an organisation that's actually helping people in Gaza by providing food and water with their Chefs for Gaza initiative.