HP gnu source-level debugger 5992-4701 - Manual (Page 136)

set endian big Instruct GDB to assume the target is big-endian.
set endian little Instruct GDB to assume the target is little-endian.
set endian auto Instruct GDB to use the byte order associated with the
executable.
show endian Display GDB's current idea of the target byte order.
Note that these commands merely adjust interpretation of symbolic data on the host,
and that they have absolutely no effect on the target system.
136 Specifying a Debugging Target