Hi and welcome here

My action plan so far:
1. Based on the practice test, Verbal seems like my strong suite but I feel a bit nervous about the vocabulary section
1.1 Is it fine for me to continue using GMAT materials for the RC and CR sections?

RC and CR are the same for both exams, eventually. If you are good on RC and CR on the GMAT you should be have problems with main ideas, inference, conclusion, weaken , and so forth
Notice how for the new GRE that stretches for two hours only several students report that NO long reading but just a medium with three questions but one who saw ONE long

See this post about the new pattern of the exam and how to calculate your score https://gre.myprepclub.com/forum/shorte ... 33239.html

1.2 Any must-have resources that I should use to ramp up on the vocabulary part? I'm planning to just study the lists I found on this website

Here all you need is more than enough https://gre.myprepclub.com/forum/gre-vo ... 27704.html

2. On the quant side, I think I'm not as used to the content as verbal. I'm wondering if GMAT quant translates 1 to 1 with GRE quant?

IF you are good at quant no problem on the GRE. Usually the quant GRE is easier or less tricky than those on the GMAT . That is for sure. However, some nasty question could come up

2.1 Are there specific topics that I should focus more of my time on vs. GMAT?

Algebra, arithmetic, geometry, word problems, exponents are hot topics. A bit less RTD or work. probability and combinatorics are marginal

2.2 Any tricks that I should be aware of given the different test formats?

You can navigate the entire section and reply the question you want. would be better to skip when you feel is hard a question and back later on. GRE is section adaptive not CAT like GMAT. so you can do this. Go first in multiple answer choices and graphics. The PS then QCQ

On Verbal first do SE

3. What are good GRE materials to use for ramping up quickly? Since I have a foundation from GMAT, I'm hoping to double down on practicing and getting over my weaknesses.

here we have a lot of stuff

quant this https://gre.myprepclub.com/forum/gre-ma ... 29264.html and this https://gre.myprepclub.com/forum/gre-ma ... -2609.html

verbal you have TC/SE RC

RC is ok if you know the GMAT

TC/SE we do not have at the moment a specific guide. But lot of questions for sure

I MEAN: for TC/SE there are several strategies but in a nutshell you have to understand the sentence if it has a contrast/shift or explain a situation. Basically is this plus vocabulary but FIRST understand the logic of the sentence

I hope this helps