The term "TGP" can stand for various things, but in the context that seems most relevant here, it could imply a personal journey or a photo gallery/portfolio (often abbreviated as TGP, which stands for "The Gallery Project" or similar). When combining "ladyboy" with "solo TGP," it seems we're delving into a highly personal and potentially artistic or documentary exploration of self by an individual who identifies as a ladyboy.
A complex "umbrella" term in Thai culture that can refer to transgender women, effeminate gay men, or those who identify as a "third gender". Often used as a translation for ladyboy solo tgp