In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+0393 (GREEK CAPITAL LETTER GAMMA).
\bbalpha\bbbeta\bbchi\bbdelta\bbDelta\bbdotlessi\bbdotlessj\bbepsilon\bbeta\bbgamma\bbGamma\bfbbGamma
\bfbbGammaSymbol
The Γ symbol (Greek capital letter gamma, U+0393), written as \bfbbGamma in LaTeX math mode.