id name Critter 1.4a 64-bit SSE4
id author Richard Vida
option name Hash type spin default 64 min 8 max 8192
option name Ponder type check default false
option name OwnBook type check default true
option name Book File type string default book.cbk
option name UCI_Chess960 type check default false
option name MultiPV type spin default 1 min 1 max 100
option name Threads type spin default 8 min 1 max 32
option name Minimum Split Depth type spin default 5 min 4 max 15
option name GaviotaTbPath type string default /gtb
option name GaviotaTbCache type spin default 32 min 4 max 256
option name GaviotaTbCompression type combo default cp4 var uncompressed var cp1
var cp2 var cp3 var cp4
option name Tablebase Usage type combo default Only At Root var Disable var Only
At Root var Everywhere
option name Clear Hash type button
option name Use Session File type check default false
option name Session File type string default session.csf
option name SF Size type spin default 32 min 2 max 1024
option name SF Write Depth type spin default 8 min 2 max 32
option name SF Strategy type combo default Score var Score var Depth
option name Clear SF type button
option name Resolve Score Drops type check default false
This is Critter 1.4a 64-bit SSE4 options, as you can see you can select path to Gaviota and about its own book i see it uses book in cbk format, what you have to do is have that book in same folder with the engine.