Intended to be used with use as a replacement for the CL package.
The GT package exports all symbols of the CL package, along with:
- ALEXANDRIA,
 - SERAPEUM less a couple of symbols with conflicts below,
 - CLOSER-MOP shadowing some CL symbols,
 - TRIVIA,
 - ITERATE,
 - FSET,
 - SPLIT-SEQUENCE,
 - CL-PPCRE,
 - NAMED-READTABLES and CURRY-COMPOSE-READER-MACROS (if the readtable is used).