These functions have been removed from this package.
Details
gRasterize was removed due to its dependency on the
raster package, on which gdalUtilities no longer
Depends. The source for gRasterize may still be found (and
sourced, using devtools::source_gist()) at
https://gist.github.com/JoshOBrien/7cf19b8b686e6d6230a78a1a9799883b.