We've banned this account for nationalistic flamewar, or whatever kind of flamewar this is, as well as for https://news.ycombinator.com/item?id=18128852.
In some cases offering money _is_ the best way to offer support. When goods are donated they're often not what's actually needed, or not in the proportions required. Planet Money covered this in an episode: https://www.npr.org/2015/11/27/457565052/food-banks-pickle-g... (transcript rather than episode link). This relates to food banks, but it also affects other organizations: https://www.theguardian.com/world/2015/nov/03/aid-workers-at... .
If you can't offer that support then I suspect that spreading the word about these projects is the next best thing.
Edited to add additional links, tidy up language.
Mentors go there from all aspects. From engineering to marketing to design. I come from a technical background, and on the first instance I did a presentation but found that it was not as useful as I had hoped. But I noticed a lack of fundamental knowledge around concepts and tech that we use on a daily basis (e.g no monitoring and a lot of manual work being done). Second time I went, I held a 3 day continuous delivery workshop introducing them to concepts like CI, CD and testing. This enabled them to deploy a simple hellow world server through a pipeline with monitoring. The feedback was that the workshop was what they needed.
If you are interested to find out more, I would suggest that you reach out to them and ask them. They have a number of initiatives (e.g coding bootcamps) and its best to understand what they have coming up and where your skills could fit in. Money no doubt would help the GSG organisation but honestly, if you can, I would go there and help on the ground. They need technical mentors more than ever.
I assure you that I dont have nothing against Gaza and its inhabitants, what irritates me is that you encourage to help them, yet you use the language so vague that it sounds more like an advertisement of their "future vibrant community" (yea, without actual drinking water and severe overpopulation, but with computers, sure, sounds plausible), without any clearly pronounced areas where they need help, except of money of course.