It's not a Gish Gallop because you've presented "a large number of evidence". It's a Gish Gallop because you've presented a large number of claims (you called out 4 specifically) each of which has extremely thin evidence and, in fact, when someone takes the time to investigate it, it's fairly easily debunked.

I already did #2.

For #1 this is information on Wikipedia about how the underlying data used by the professor was not sufficient to support his conclusions.

https://en.wikipedia.org/wiki/Steven_J._Miller#2020_Election

For #3 here is a reuters post debunking the assertion:

https://www.reuters.com/article/uk-factcheck-oklahoma/fact-c...

For #4 here is a post from some Georgia press (the assertion was about fraud in Georgia) debunking the assertions:

https://www.11alive.com/article/news/politics/elections/fact...