In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+22D9 (VERY MUCH GREATER-THAN).
Collapse gggtr to the shorter ggg character.
\gggtr \gggIn Relations103
All 103 in Relations\gggtrSymbol
The ⋙ symbol (Very much greater-than, U+22D9), written as \gggtr in LaTeX math mode.