I came across a minor pitfall in one of the steps of the tutorial for compiling on VS2017. When downloading from http://gisinternals.com, there are now two categories of stable releases, while there was only one at the time of the tutorial video’s recording. The category to download is “GDAL 2.4.4”, as the " GDAL 3.0.4" category causes errors when building.
It would be great if you could do this. Just submit a pull request with your changes and we’ll have a look at it.
The biggest challenge with GDAL v3 is that they also moved to PROJ.6 which is using a different approach for the projections. This will involve major changes in MapWinGIS but also in MW5.