I have been trying this for a day or two now, and I have followed the instructions listed here: How to add support for FileGDB (Esri file gdb API) driver in fiona but for the life of me I can't seem to get ogr2ogr to recognize FileGDB as a driver. My end goal is to append shapefiles to an already exisiting .gdb file on my local machine. I have set all the environment variables to the seemingly appropriate locations (GDAL_DATA, GDAL_DRIVER_PATH, PROJ_LIB, etc.), and all my dll files seem to be in the correct location. I am using Python 3.7.4 via Anaconda3 command console. Furthermore, I am using Windows 10.