Is it common knowledge what TGP is? I never heard this acronym before.
Searching Wikipedia brings up a few likely candidates, e.g. Tokyo Ghetto *****.
Well I guess it could be like this article claims too, but I have my doubts.
https://www.geeks3d.com/20190613/graphics-cards-power-tdp-tgp/
TGP = 'Total Graphics Power'
"The power that a power supply should provide to the graphics subsystem, an add-in-card in most cases. The application used to define TGP and TDP is a stressful “real world” application."
In other words, how much power the card will require from the PSU in a realistic, maximum scenario.