高爾吉亞革新了修辭學,又提出了paradoxologia,即矛盾的思考和命題,故他又被譽為「謬論之父」(Wardy 6)。他的重要著述為Technai,是一本教導修辭學的手冊(Leitch, et al 29);當中僅Encomium(頌詞)和Defense(辯解)兩卷完整流傳下來。亞里士多德也有提到高爾吉亞的言論和觀點。
高爾吉亞的著作《論自然與不存在》(On Nature or the Non-Existent)已經散失,只能從兩部著作的引文得悉部分內容。該兩部著作為塞克斯都·恩披里柯的Against the Professors及匿名作者的De Melissus, Xenophane, Gorgia。曾論述「萬物皆不存在;萬物即使存在,吾人也不可知;即使無人知悉萬物,也無法傳達這種知識」以下是從中總結出的論點:
Consigny, Scott. Gorgias: Sophist and Artist. Columbia: University of South Carolina Press, 2001.
Gorgias. “Encomium of Helen.” The Norton Anthology of Theory and Criticism. Eds. Vincent B. Leitch, et al. New York: W.W. Norton & Company, 2001. 30-33.
Jarratt, Susan C. Rereading the Sophists: Classical Rhetoric Refigured. Carbondale and Edwardsville: Southern Illinois University Press, 1991.
Leitch, Vincent B., et al, eds. The Norton Anthology of Theory and Criticism. New York: W. W. Norton & Company, 2001.
McComiskey, Bruce. Gorgias and the New Sophistic Rhetoric. Carbondale and Edwardsville: Southern Illinois University Press, 2001.
Plato. Gorgias. Trans. Robin Waterfield. Oxford University Press, 1994.
Walker, Jeffrey. Rhetoric and Poetics in Antiquity. New York: Oxford University Press, 2000.
Wardy, Robert. The Birth of Rhetoric: Gorgias, Plato and Their Successors. New York: Routledge, 1996.
Sprague, Rosamond Kent, The Older Sophists, Hackett Publishing Company(ISBN 0-87220-556-8).