Very good condition. Two 13 pin cables. All the adapters for the pickup in the bag. Bag included.

Specs from roland site:

GR-55:

Sound GeneratorPCM: 2 tones
Modeling: 1 toneTonesPCM: 910 types
Modeling: 23 types (guitar mode)
17 types (bass mode)EffectsMFX (Multi-Effects): 20 types
AMP (Preamp): 42 types
MOD (Modulation): 14 types
DELAY: 7 types
REVERB: 5 types
CHORUS: 4 types
EQ: 1 typePatch MemoryGuitar mode
Preset: 270 + User: 297
Bass mode
Preset: 90 + User: 297AD Conversion24-bit (GK Pickup)
24-bit + AF method ** (Normal Pickup)DA Conversion24-bitSampling Frequency44.1 kHzNominal Output LevelOUTPUT jacks: -10 dBu
GUITAR OUT jack: -10 dBuOutput ImpedanceOUTPUT jacks: 2 k ohms
GUITAR OUT jack: 2 k ohmsUSB Memory Audio PlayerFile Format: WAV, AIFFDisplayGraphic LCD 240 x 64 dotsConnectorsGK IN connector (13 pins DIN type)
GUITAR OUT jack (1/4-inch phone type)
OUTPUT L/MONO, R jacks (1/4-inch phone type)
PHONES jack (Stereo 1/4-inch phone type)
MIDI connectors (IN, OUT) (5-pin DIN type)
USB COMPUTER connector (supports Hi-Speed USB, USB MIDI and
USB Audio)
USB MEMORY connector (supports Hi-Speed USB Flash Memory)
DC IN jackPower SupplyDC 9 VCurrent Draw700 mAAccessoriesAC adaptor (PSB-1U + AC Cord Set)
Owner's manual
Divided pickup (GK-3) (only for GK included model)
GK cable (5 m) (only for GK included model)Options (sold separately)Divided pickup: GK-3 (for guitar), GK-3B (for bass guitar)
GK cable: GKC-5 (5 m), GKC-10 (10 m)
MIDI foot controller: FC-300
Unit selector: US-20
AC adaptor (PSB-1U)

Size and Weight

Width405 mm
16 inchesDepth244 mm
9-5/8 inchesHeight78 mm
3-1/8 inchesWeight3.3 kg
7 lbs. 5 oz.

GK3 specs:

ControlsGK Volume
DOWN/S1 Switch
UP/S2 Switch
Select SwitchIndicatorPower IndicatorConnectorsGK Connector
Normal Pickup Input JackAccessoriesNormal Guitar Cable Owner's ManualOptionsGK Cable: GKC-5 (5 m), GKC-10 (10 m), Unit Selector: US-20GK GK Parallel Cable: GKP-2Size and Weight ( BODY )Width87 mm
3-7/16 inchesDepth74 mm
2-15/16 inchesHeight23 mm
0-15/16 inchesWeight0.1 kg
0 lbs. 3 oz.

Size and Weight ( PICKUP )

Width102 mm
4-1/16 inchesDepth8 mm
0-5/16 inchesHeight9 mm
0-3/8 inches