Why do not you add gdal via maven dependency instead of jar?

i just followed the instructions to update gdal.
this project is built by gradle not maven.
maybe there's a limitation in the repository as gdal is not on central.

Gdal is available on central.
Try to use dependencies from Maven Central repository.

there seems to be two different conflicting set of instructions on how to upgrade gdal.
on README_DEVELOPER.TXT states:

Updating the JOGL Library

1. Download the JOGL deployment package archive/jogamp-all-platforms.7z for the new JOGL version. JOGL deployment
   packages are organized by version at the following URL:
   ###http://jogamp.org/deployment/

2. Extract the archive, then copy the following 15 files to the WorldWind Java project root:
   gluegen-rt-natives-linux-amd64.jar
   gluegen-rt-natives-linux-i586.jar
   gluegen-rt-natives-macosx-universal.jar
   gluegen-rt-natives-windows-amd64.jar
   gluegen-rt-natives-windows-i586.jar
   gluegen-rt.jar
   gluegen.LICENSE.txt
   jogl-all-natives-linux-amd64.jar
   jogl-all-natives-linux-i586.jar
   jogl-all-natives-macosx-universal.jar
   jogl-all-natives-windows-amd64.jar
   jogl-all-natives-windows-i586.jar
   jogl-all.jar
   jogl.LICENSE.txt
   jogl.README.txt

3. Update the JOGL version in the following files:
   README.txt
   README_DEVELOPER.txt (this document)
   release-build.xml (JOGL link in javadocs target)

this is what i did and it works.
but on GDAL_README.txt states:

When using the Gradle build script, note that the version number
defined by 'gdalVersion' must match the binary libraries that are
installed. The Gradle build script pulls the 'gdal.jar' from
Maven or JCenter. If you want to use 'gdal.jar' from the local
disk, change the Gradle script to specify

     dependencies {
         ...
          compile files('gdal.jar')
          ...
      }

am i mixing gdal with jogl and shouldn't?
that's probably it.
will try.