The manual for GAP-3.4.4 does not yet contain documentation for the library
of small groups computed by Bettina Eick and Hans Ulrich Besche. This
library is included in GAP 3.4.4 anyhow.
Therefore, there has been some confusion recently with a pointer on the
'data libraries' web page that points the small groups library to the
command 'SolvableGroup' in the manual. (This pointer was added as it had
been the closest approximation in the manual.)
This pointer has been changed now.
Apologies for any confusion this has created.