is there any document that contains all the questions greg teaches in class videos???
I am not aware of one; however I think this would be difficult because we write many of the questions, and these are intended only for GregMAT+ subscribers. Making a PDF out of it would be easy, but would almost certainly result in the questions leaking, which I’m not sure would be something Greg would be OK with.
For Quantitative part : He majorly writes his own questions now but daily practice problems are a good place to found them &practice them (Just screenshot copy 10/20 problems from daily practice in a file and give your self around 1:45 per question or less than 2 mins , LINK: daily practice) , rest of the problems comes from BigBook + official material+ GMAT official OG .
For verbal : He uses Big Book for majority of the part and you can find this document by making few clicks on the internet, rest of the problems comes from ETS official OG and Official Gre Verbal Reasoning Practice Questions book. (for both you can buy a pdf copy or buy the print and have them in paper.)