Hi Guys,
Great News!
DroidScript is going to officially support the VIM platform, including GPIO access 
The latest alpha release of DroidScript which provides support for VIM can be found here:- http://androidscript.org/alpha/DroidScript_159a2
I’ve personally tested it on Vim_Nougat_Root_170421 with no issues. Let me know if you find any issues in other versions.
Here’s an example of flipping the GPIOH5 pin from a native Android toggle button:-
//Called when application is started.
function OnStart()
{
//Create a layout with objects vertically centered.
lay = app.CreateLayout( "linear", "VCenter,FillXY" );
//Create a toggle button.
tgl = app.CreateToggle( "Toggle Button", 0.4 );
tgl.SetMargins( 0, 0.02, 0, 0 );
tgl.SetOnTouch( tgl_OnTouch );
lay.AddChild( tgl );
//Add layout to app.
app.AddLayout( lay );
//Setup the GPIO pin.
sys = app.CreateSysProc("su");
sys.Out( "echo " + 176 + " > /sys/class/gpio/export\n" );
sys.Out( "echo out > /sys/class/gpio/gpio" + 176 + "/direction\n" );
}
//Called when user touches our toggle button.
function tgl_OnTouch( isChecked )
{
if( isChecked )
sys.Out( "echo 1 > /sys/class/gpio/gpio" + 176 + "/value\n" );
else
sys.Out( "echo 0 > /sys/class/gpio/gpio" + 176 + "/value\n" );
}