Hi - @user134932 - Larry,
took a quick peek at the datasheet (attached for convenience) and it looks close to just many of these TFT drivers: the GC9A01 doc is in many parts identical to ILI9341 doc, even looking at the internals it is the same: 240x320 memory.... So I took the command lists for comparison to start out from a copy the ILI9341 driver (http://www.espruino.com/modules/ILI9341.js) and adjust it to work with the GC9A01. For easy dev place the driver module inline and give it a shot (see Module development - using example of Temperature Nodes with 1-Wire PT100 / DS18B20 Sensor at multiple Locations, Module creation at runtime). I hope this is not carrying awls to Athens. ;-}
PS: The ILI9341 command list (and comparison / map) is in the next post.
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